CN108285355A - The method for preparing SiC nanowire intensified response sintered silicon carbide ceramics based composites - Google Patents
The method for preparing SiC nanowire intensified response sintered silicon carbide ceramics based composites Download PDFInfo
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- CN108285355A CN108285355A CN201810058728.8A CN201810058728A CN108285355A CN 108285355 A CN108285355 A CN 108285355A CN 201810058728 A CN201810058728 A CN 201810058728A CN 108285355 A CN108285355 A CN 108285355A
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- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 191
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 190
- 239000002070 nanowire Substances 0.000 title claims abstract description 87
- 239000000919 ceramic Substances 0.000 title claims abstract description 69
- 239000002131 composite material Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000004044 response Effects 0.000 title claims abstract description 14
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000005011 phenolic resin Substances 0.000 claims abstract description 79
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 79
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 46
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 239000002121 nanofiber Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 129
- 239000002002 slurry Substances 0.000 claims description 82
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 56
- 239000000463 material Substances 0.000 claims description 49
- 238000000498 ball milling Methods 0.000 claims description 41
- 238000013019 agitation Methods 0.000 claims description 39
- 235000015895 biscuits Nutrition 0.000 claims description 37
- 238000005245 sintering Methods 0.000 claims description 34
- 235000019441 ethanol Nutrition 0.000 claims description 28
- 238000000748 compression moulding Methods 0.000 claims description 27
- 239000008367 deionised water Substances 0.000 claims description 26
- 229910021641 deionized water Inorganic materials 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000001035 drying Methods 0.000 claims description 23
- 239000008187 granular material Substances 0.000 claims description 21
- 238000005253 cladding Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 238000001291 vacuum drying Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 13
- 230000010355 oscillation Effects 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 12
- 238000005469 granulation Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000011268 mixed slurry Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 2
- HPNSNYBUADCFDR-UHFFFAOYSA-N chromafenozide Chemical compound CC1=CC(C)=CC(C(=O)N(NC(=O)C=2C(=C3CCCOC3=CC=2)C)C(C)(C)C)=C1 HPNSNYBUADCFDR-UHFFFAOYSA-N 0.000 abstract description 10
- 238000011065 in-situ storage Methods 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 abstract description 5
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 206010001497 Agitation Diseases 0.000 description 36
- 239000000047 product Substances 0.000 description 15
- 239000002245 particle Substances 0.000 description 13
- 239000006185 dispersion Substances 0.000 description 11
- 238000002156 mixing Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 8
- 238000007873 sieving Methods 0.000 description 8
- 239000006228 supernatant Substances 0.000 description 6
- 229920002472 Starch Polymers 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 235000019698 starch Nutrition 0.000 description 5
- 239000008107 starch Substances 0.000 description 5
- 229910010293 ceramic material Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 235000013339 cereals Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- SICLLPHPVFCNTJ-UHFFFAOYSA-N 1,1,1',1'-tetramethyl-3,3'-spirobi[2h-indene]-5,5'-diol Chemical compound C12=CC(O)=CC=C2C(C)(C)CC11C2=CC(O)=CC=C2C(C)(C)C1 SICLLPHPVFCNTJ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000209094 Oryza Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229910021426 porous silicon Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/638—Removal thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6581—Total pressure below 1 atmosphere, e.g. vacuum
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Abstract
The invention discloses a kind of methods preparing SiC nanowire intensified response sintered silicon carbide ceramics based composites.This method is using phenolic resin as the single carbon source of reaction system, phenolic resin is used simultaneously to coat carbon source, surface modification is carried out to SiC nanowire, form carbon coating SiC nanowire, it is dispersed among SiC ceramic precast body, and being then prepared into SiC nano fiber by reaction-sintered enhances SiC ceramic based composites.The present invention prepares ceramic matric composite as reinforcement using SiC nanowire by reaction-sintered principle, effectively improves the combination interface of nanofiber and matrix, and realization is effectively increased toughening；It avoids and has reported that reaction-sintered causes silicon carbide whisker/nano wire to participate in reaction or problem of growing up；The growth for avoiding growth in situ nano wire is uneven and bad with basal body interface combination effect, not fine and close problem.
Description
Technical field
The present invention relates to a kind of preparation methods of ceramic matric composite, and in particular to a kind of to prepare SiC nanowire enhancing
The method of reaction sintering silicon carbide ceramic based composites.
Background technology
Silicon carbide（SiC）Ceramic material be with silicon carbide ceramic material as main component, as a kind of structural material, because
It is widely used in modern national defense, aviation boat with the good characteristics such as anti-oxidant, low-density, high temperature resistant, high rigidity, corrosion-resistant
It, the every field such as automobile industry and mechanical industry.The main preparation methods of SiC ceramic material include normal sintering, hot pressing
Sintering, gas pressure sintering, HIP sintering and reaction-sintered etc..Wherein, reaction sintering technology（RBSC）It is set due to having
It is now using more for simple, at low cost, residual porosity rate is low, can realize that near-net-shape prepares the product of complicated shape
A kind of extensive preparation process.However, original silicon carbide in RBSC（SiC）Particle size increases, and free silica quantity increases, and dissociates
Carbon number amount is reduced, although density and the porosity do not change, fracture strength reduces, and certain influence is generated to mechanical property,
Ceramic material is limited more to be widely applied.In order to improve the mechanical property of ceramic matric composite, grain can be generally introduced
Son, whisker, fiber etc. carry out strengthening and toughening as the second phase, by introducing fibre reinforcement in the base, improve reaction-sintered
The mechanical property of silicon carbide.In recent years, ceramic matric composite can be significantly improved by being used as reinforcement by introducing high-intensity fiber
Performance, caused the extensive concern of researchers.SiC whiskers are a kind of with high-melting-point, Gao Biqiang, low bulk
The material of the good characteristics such as coefficient and chemical stability, has been widely used in the preparation of advanced ceramics composite material.Such as
Chinese patent application CN 102161594A（Publication number）Disclose " a kind of SiC ceramic based composites that SiC whiskers are strengthened and
Preparation method ", this SiC ceramic based composites are prepared by prefabricated component by the reaction of Si or Si alloy infiltrations, described
Prefabricated component be made by the raw material compression molding including SiC Whiskers from Rice Hulls product.Composite process preparation process is simple,
Frit reaction temperature is low, is not necessarily to impressed pressure, and prefabricated component can be made into complicated shape, can be used for the component of complicated shape.In for another example
103951454 A of state patent application CN（Publication number）Disclose " a kind of ceramic matric composite of SiC whisker reinforcements ", the party
Method is to make to adhere to tiny SiC whiskers between fibre bundle or silk using physical method, passes through chemical vapor infiltration（CVI）With
Ceramic matrix is generated between the fiber of SiC whiskers, does not destroy whisker morphology and mechanical property, and the fracture toughness of composite material is made to obtain
Large increase, and the fracture toughness of material and bending strength increase with the relative density of material.Compared with SiC whiskers,
SiC nanowire has high length-diameter ratio and higher mechanical property.Currently, the SiC nanowire of report out is with thermodynamically stable
Based on the high-purity β-SiC of monocrystalline.Yang etc. uses the SiC nanometers of method in-situ preparation material with carbon-coated surface in SiC prelists body of CVD
Line, the bending strength that SiC nanowire enhancing SiC ceramic based composites are prepared reach 750 ± 103 MPa, fracture toughness
Reach 20.3 ± 2 MPam1/2（Yang W, Araki H, Tang C, et al. Single-crystal SiC
nanowires with a thin carbon coating for stronger and tougher ceramic
composites[J]. Advanced Materials, 2005, 17(12):1519-1523.）；The adjustment PCS's such as Yoon contains
Amount is 20 %, the SiC nanowire of non-directional is grown in the porous SiC ceramics basis material of high-sequential, for preparing is more
Hole SiC ceramic based composites have good thermal stability and higher mechanical property（Yoon B H, Park C S,
Kim H E, et al. In Situ synthesis of porous silicon carbide (SiC) ceramics
decorated with SiC Nanowires[J]. Journal of the American Ceramic Society,
2010, 90(12):3759-3766.）Above-mentioned document all uses growth in situ SiC nanowire enhancing SiC ceramic base composite wood
Material.But SiC nanowire all grows out in situ, and the process is more complicated for carbon coating, according to the above research, the present invention
Using phenolic resin as the single carbon source of reaction system, surface modification is carried out to SiC nanowire, forms carbon coating SiC nanowire,
Even to be dispersed among SiC ceramic precast body, being then prepared into SiC nano fiber by reaction-sintered enhances SiC ceramic base
Composite material.The invention is beneficial in that the effective combination interface for improving nanofiber and matrix, realizes and effectively increases
Add toughening；It avoids and has reported that reaction-sintered causes silicon carbide whisker/nano wire to participate in reaction or problem of growing up；Avoid original position
The growth for growing nano wire is uneven and bad with basal body interface combination effect, not fine and close problem.
Invention content
SiC nanowire intensified response sintered silicon carbide ceramics based composites are prepared the purpose of the present invention is to provide a kind of
Method, be utilize reaction sintering technology, by phenolic resin be carbon source carbon coating technique to nanofiber carry out surface change
Property enhances the preparation method of ceramic matric composite.
The technical solution adopted by the present invention is：
This method uses phenolic resin to coat carbon source using phenolic resin as the single carbon source of reaction system, to SiC nanometers
Line carries out surface modification, forms carbon coating SiC nanowire, it is dispersed among SiC ceramic precast body, then passes through reaction
Sintering is prepared into SiC nano fiber enhancing SiC ceramic based composites.
This method includes the following steps：
Step 1) first dissolves phenolic resin and ethyl alcohol mechanical agitation, obtains yellow solution A, the wherein matter of phenolic resin and ethyl alcohol
Amount is than being 1:2-4；
SiC nanowire and SiC powder are uniformly mixed by step 2), obtain B powders, and wherein SiC nanowire and SiC powder mass ratioes is 2-
3:17；
Powder material B is put into planetary ball mill ball milling by step 3), and using deionized water as ball-milling medium, the ball of SiC materials is to grind
The mass ratio of abrading-ball, mill ball and powder material B is 5:1, Ball-milling Time is set as 1.5-2 h, obtains slurry C, drying, grinding and mistake
Sieve is granulated, and obtains D powders；
Solution A and powder D are made it be uniformly mixed by step 4) through mechanical agitation and ultrasonic disperse, match to obtain ceramic mixed slurry E, will
Slurry E is instilled in the deionized water of sonic oscillation, while mechanical agitation makes hybrid ceramic slurry disperse, and obtains solution F, wherein solution
A and powder D mass ratioes are 2-5:1；
F solution left standstills are precipitated 30-45min by step 5), are removed section top clear liquid, slurry G are obtained, by PVA solution and slurry G machines
Tool stirs to obtain Solution H, granulation of then drying, grind and be sieved again, obtains the composite granule I of phenolic resin cladding, and wherein PVA is molten
Liquid is 15-25 with slurry G mass ratioes:1；
Step 6) pours into the composite granule I that phenolic resin coats in molding die, is pressed under the single effect of hydraulic press
Type, and compacting height is limited, the biscuit of compression moulding is obtained, the wherein pressure of hydraulic press is the MP of 20 MP~35；
The biscuit of compression moulding is placed in vacuum drying chamber at 85 DEG C -90 DEG C dry 10-12h by step 7), is put into after taking-up
Dumping processing is carried out in Muffle furnace, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source, it is coated on SiC nanowire and SiC
The surface of powder granule forms carbon coating, sets dump temperature as 850 DEG C -900 DEG C；
Step 8) finally carries out reaction-sintered to biscuit, and reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that entire sintering
Vacuum degree is less than 10 Pa in burner hearth in the process, and maximum temperature is 1500 DEG C -1600 DEG C.
Preferably, the mass ratio of phenolic resin described in step 1) and ethyl alcohol is 1:2；Phenolic resin should select water-insoluble
Phenolic resin.
Preferably, SiC nanowire described in step 2) and SiC powder mass ratioes are 3:17；SiC nanowire is selected from heat
The high-purity beta-SiC nano-wire of monocrystalline that mechanics is stablized；SiC powder diameters are 0.1 ~ 30 micron.
Preferably, abrading-ball described in step 3) and the mass ratio of powder material B are 5:When 1, Ball-milling Time is set as 1.5h.
Preferably, solution A described in step 4) and powder D mass ratioes are 3:1.
Preferably, F solution left standstills described in step 5) precipitates 30min, PVA solution is 20 with slurry G mass ratioes:1.
Preferably, the pressure of hydraulic press described in step 6) is 20 MP.
Preferably, dry 12 h, dumping maximum temperature are 900 at 90 DEG C in vacuum drying chamber described in step 7)
℃。
Preferably, vacuum degree is less than 10 Pa in burner hearth described in step 8), maximum temperature is 1500 DEG C.
The invention has the advantages that：
The present invention prepares ceramic matric composite as reinforcement using SiC nanowire by reaction-sintered principle, effectively changes
The combination interface of nanofiber and matrix has been apt to it, realization is effectively increased toughening；It avoids and has reported that reaction-sintered leads to silicon carbide
Whisker/nano wire participates in reaction or problem of growing up；Avoid growth in situ nano wire growth it is uneven and with basal body interface knot
It is bad to close effect, not fine and close problem.
Description of the drawings
Fig. 1 is the selected SiC nanowire high power scanning electron microscope (SEM) photograph of the present invention.
Fig. 2 is to enhance ceramic matric composite scanning electron microscope with SiC nanowire produced by the present invention（SEM）Photo.
Fig. 3 is to enhance ceramic matric composite light micrograph with SiC nanowire produced by the present invention.
Specific implementation mode
The present invention will be further described with reference to embodiments.
Embodiment 1
The ethyl alcohol mechanical agitation of the phenolic resin of 4g and 8g are dissolved, yellow solution A is obtained.The wherein matter of phenolic resin and ethyl alcohol
Amount is than being 1:2.The SiC powder of the SiC nanowire of 15g and 85g are uniformly mixed, B powders, wherein SiC nanowire and SiC powder are obtained
Mass ratio is 3:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, the ball of SiC materials is
The mass ratio of mill ball, mill ball and powder material B is 5:1, Ball-milling Time is set as 1.5h, obtains slurry C, drying, grinding and mistake
Sieve is granulated, and obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain ceramic mixing slurry
Expect E, slurry E is slowly instilled in the deionized water of large power supersonic oscillation, while high speed machine stirring makes hybrid ceramic starch
Expect rapid dispersion, obtains solution F.Wherein solution A and powder D mass ratioes are 3:1.F solution left standstills are precipitated into 30 min, remove part
Supernatant liquor obtains slurry G, PVA solution and slurry G mechanical agitations is obtained Solution H, granulation of then drying, grind and be sieved again obtains
The composite granule I coated to phenolic resin, wherein PVA solution are 20 with slurry G mass ratioes:1.By the compound of phenolic resin cladding
Powder I is poured into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, is centainly suppressed
The biscuit of density, the wherein pressure of hydraulic press are 20 megapascal（MP）.The biscuit of compression moulding is placed in vacuum drying chamber 85
Dry 12 h at DEG C are put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source,
It is coated on SiC nanowire and the surface of SiC powder particle forms carbon coating, sets dumping maximum temperature as 900 DEG C.Finally
Reaction-sintered is carried out to biscuit, reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that true in burner hearth in entire sintering process
Reciprocal of duty cycle is less than 10 Pa, and maximum temperature is set as 1500 DEG C.Fig. 1 is the selected SiC nanowire high power scanning electron microscope (SEM) photograph of the present invention,
Illustrate that SiC nanowire has high length-diameter ratio.Made Sample Scan electron microscope is as shown in Figure 2, it can be seen that SiC nanometers carbon-coated
Line is uniformly inserted among SiC powder particle, since carbon coating enhances ceramic matrix boundary strength.Significantly improve mechanical property
Energy.Fig. 3 is the micro-organization chart of sample, shows composite structure densification, it can be seen that due to carbon coating, tissue crystal grain becomes
Must be tiny, play the role of refined crystalline strengthening, improves its mechanical property.Beam test detection, bending strength finally are carried out to finished product
Up to 300 MPa improve 20% compared with the finished product of non-Ghana's rice noodles.These are the result shows that using SiC nanowire as enhancing
Body prepares ceramic matric composite by reaction-sintered principle, and product property obtained is good.
Embodiment 2
The ethyl alcohol mechanical agitation of the phenolic resin of 4g and 16g are dissolved, yellow solution A is obtained.Wherein phenolic resin and ethyl alcohol
Mass ratio is 1:4.The SiC powder of the SiC nanowire of 15g and 85g are uniformly mixed, B powders, wherein SiC nanowire and SiC are obtained
Powder mass ratio is 3:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, the ball of SiC materials
For mill ball, the mass ratio of mill ball and powder material B is 5:1, Ball-milling Time is set as 2h, obtains slurry C, drying, grinding and mistake
Sieve is granulated, and obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain ceramic mixing slurry
Expect E, slurry E is slowly instilled in the deionized water of large power supersonic oscillation, while high speed machine stirring makes hybrid ceramic starch
Expect rapid dispersion, obtains solution F.Wherein solution A and powder D mass ratioes are 3:1.F solution left standstills are precipitated into 45 min, remove part
Supernatant liquor obtains slurry G, PVA solution and slurry G mechanical agitations is obtained Solution H, granulation of then drying, grind and be sieved again obtains
The composite granule I coated to phenolic resin, wherein PVA solution are 15 with slurry G mass ratioes:1.By the compound of phenolic resin cladding
Powder I is poured into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, is centainly suppressed
The biscuit of density, the wherein pressure of hydraulic press are 35 MP.The biscuit of compression moulding is placed in vacuum drying chamber and is done at 85 DEG C
Dry 12 h is put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source, it is coated
Carbon coating is formed in the surface of SiC nanowire and SiC powder particle, sets dump temperature as 900 DEG C.Finally biscuit is carried out
Reaction-sintered, reaction-sintered carry out in vacuum non-pressure sintering furnace, it is ensured that vacuum degree is less than 10 in burner hearth in entire sintering process
Pa, maximum temperature are set as 1600 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 3
The ethyl alcohol mechanical agitation of the phenolic resin of 4g and 8g are dissolved, yellow solution A is obtained.The wherein matter of phenolic resin and ethyl alcohol
Amount is than being 1:2.The SiC powder of the SiC nanowire of 15g and 85g are uniformly mixed, B powders, wherein SiC nanowire and SiC powder are obtained
Mass ratio is 3:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, the ball of SiC materials is
The mass ratio of mill ball, mill ball and powder material B is 5:1, Ball-milling Time is set as 2h, obtains slurry C, drying, grinding and sieving
It is granulated, obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain ceramic mixed slurry
E slowly instills slurry E in the deionized water of large power supersonic oscillation, while high speed machine stirring makes hybrid ceramic slurry
Rapid dispersion obtains solution F.Wherein solution A and powder D mass ratioes are 3:1.F solution left standstills are precipitated into 35 min, are removed on part
Layer clear liquid, obtains slurry G, PVA solution and slurry G mechanical agitations is obtained Solution H, granulation of then drying, grind and be sieved again obtains
The composite granule I of phenolic resin cladding, wherein PVA solution are 20 with slurry G mass ratioes:1.The composite powder that phenolic resin is coated
Body I is poured into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, is centainly suppressed close
The biscuit of degree, the wherein pressure of hydraulic press are 20 MP.The biscuit of compression moulding is placed in vacuum drying chamber at 90 DEG C dry
10 h are put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source, it is coated on
The surface of SiC nanowire and SiC powder particle forms carbon coating, sets dump temperature as 850 DEG C.Finally biscuit is carried out anti-
It should be sintered, reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that vacuum degree is less than 10 in burner hearth in entire sintering process
Pa, maximum temperature are set as 1500 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 4
The ethyl alcohol mechanical agitation of the phenolic resin of 4g and 8g are dissolved, yellow solution A is obtained.The wherein matter of phenolic resin and ethyl alcohol
Amount is than being 1:2.The SiC powder of the SiC nanowire of 15g and 127.5g are uniformly mixed, obtain B powders, wherein SiC nanowire and
SiC powder mass ratioes are 2:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, SiC materials
Ball is mill ball, and the mass ratio of mill ball and powder material B is 5:1, Ball-milling Time is set as 1.5h, obtains slurry C, and drying is ground
Mill and sieving are granulated, and obtain D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches ceramic
Mixed slurry E slowly instills slurry E in the deionized water of large power supersonic oscillation, while high speed machine stirring makes mixing
Ceramic slurry rapid dispersion obtains solution F.Wherein solution A and powder D mass ratioes are 3:1.F solution left standstills are precipitated into 35 min, clearly
Except section top clear liquid, slurry G is obtained, PVA solution and slurry G mechanical agitations are obtained into Solution H, then dries, grind and is sieved again
It is granulated, obtains the composite granule I of phenolic resin cladding, wherein PVA solution and slurry G mass ratioes are 15:1.By phenolic resin packet
The composite granule I covered is poured into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, is obtained
The biscuit of certain pressed density, the wherein pressure of hydraulic press are 35 MP.The biscuit of compression moulding is placed in vacuum drying chamber
Dry 12 h at 85 DEG C are put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon
Source, it is coated on SiC nanowire and the surface of SiC powder particle forms carbon coating, sets dump temperature as 900 DEG C.It is finally right
Biscuit carries out reaction-sintered, and reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that vacuum in burner hearth in entire sintering process
Degree is less than 10 Pa, and maximum temperature is set as 1550 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 5
The ethyl alcohol mechanical agitation of the phenolic resin of 4g and 8g are dissolved, yellow solution A is obtained.The wherein matter of phenolic resin and ethyl alcohol
Amount is than being 1:2.The SiC powder of the SiC nanowire of 15g and 85g are uniformly mixed, B powders, wherein SiC nanowire and SiC powder are obtained
Mass ratio is 3:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, the ball of SiC materials is
The mass ratio of mill ball, mill ball and powder material B is 5:1, Ball-milling Time is set as 1.7h, obtains slurry C, drying, grinding and mistake
Sieve is granulated, and obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain ceramic mixing slurry
Expect E, slurry E is slowly instilled in the deionized water of large power supersonic oscillation, while high speed machine stirring makes hybrid ceramic starch
Expect rapid dispersion, obtains solution F.Wherein solution A and powder D mass ratioes are 5:1.F solution left standstills are precipitated into 30 min, remove part
Supernatant liquor obtains slurry G, PVA solution and slurry G mechanical agitations is obtained Solution H, granulation of then drying, grind and be sieved again obtains
The composite granule I coated to phenolic resin, wherein PVA solution are 25 with slurry G mass ratioes:1.By the compound of phenolic resin cladding
Powder I is poured into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, is centainly suppressed
The biscuit of density, the wherein pressure of hydraulic press are 30 MP.The biscuit of compression moulding is placed in vacuum drying chamber and is done at 85 DEG C
Dry 11 h is put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source, it is coated
Carbon coating is formed in the surface of SiC nanowire and SiC powder particle, sets dump temperature as 870 DEG C.Finally biscuit is carried out
Reaction-sintered, reaction-sintered carry out in vacuum non-pressure sintering furnace, it is ensured that vacuum degree is less than 10 in burner hearth in entire sintering process
Pa, maximum temperature are set as 1600 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 6
The ethyl alcohol mechanical agitation of the phenolic resin of 4g and 12g are dissolved, yellow solution A is obtained.Wherein phenolic resin and ethyl alcohol
Mass ratio is 1:3.The SiC powder of the SiC nanowire of 15g and 102g are uniformly mixed, obtain B powders, wherein SiC nanowire and
SiC powder mass ratioes are 2.5:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, SiC materials
Ball be mill ball, the mass ratio of mill ball and powder material B is 5:1, Ball-milling Time is set as 1.8h, obtains slurry C, drying,
Grinding and sieving are granulated, and obtain D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain pottery
Porcelain mixed slurry E slowly instills slurry E in the deionized water of large power supersonic oscillation, while high speed machine stirring makes to mix
Ceramic slurry rapid dispersion is closed, solution F is obtained.Wherein solution A and powder D mass ratioes are 4:1.F solution left standstills are precipitated into 37min,
Section top clear liquid is removed, slurry G is obtained, PVA solution and slurry G mechanical agitations are obtained into Solution H, then dries, grind and mistake again
Sieve is granulated, and obtains the composite granule I of phenolic resin cladding, wherein PVA solution and slurry G mass ratioes are 20:1.By phenolic resin
The composite granule I of cladding is poured into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, is obtained
To the biscuit of certain pressed density, the wherein pressure of hydraulic press is 30 MP.The biscuit of compression moulding is placed in vacuum drying chamber
Dry 12 h at 90 DEG C are put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, to be become
Carbon source, it is coated on SiC nanowire and the surface of SiC powder particle forms carbon coating, sets dump temperature as 900 DEG C.Finally
Reaction-sintered is carried out to biscuit, reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that true in burner hearth in entire sintering process
Reciprocal of duty cycle is less than 10 Pa, and maximum temperature is set as 1550 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 7
The ethyl alcohol mechanical agitation of the phenolic resin of 5g and 10g are dissolved, yellow solution A is obtained.Wherein phenolic resin and ethyl alcohol
Mass ratio is 1:2.The SiC powder of the SiC nanowire of 15g and 85g are uniformly mixed, B powders, wherein SiC nanowire and SiC are obtained
Powder mass ratio is 3:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, the ball of SiC materials
For mill ball, the mass ratio of mill ball and powder material B is 5:1, Ball-milling Time is set as 1.5h, obtains slurry C, drying, grinding and
Sieving is granulated, and obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain ceramic mixing
Slurry E slowly instills slurry E in the deionized water of large power supersonic oscillation, while high speed machine stirring makes hybrid ceramic
Slurry rapid dispersion obtains solution F.Wherein solution A and powder D mass ratioes are 3:1.F solution left standstills are precipitated into 35 min, removing portion
Divide supernatant liquor, obtain slurry G, PVA solution and slurry G mechanical agitations are obtained into Solution H, granulation of then drying, grind and be sieved again,
The composite granule I of phenolic resin cladding is obtained, wherein PVA solution and slurry G mass ratioes are 15:1.By answering for phenolic resin cladding
It closes powder I to pour into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, obtain a level pressure
The biscuit of density processed, the wherein pressure of hydraulic press are 25 MP.The biscuit of compression moulding is placed in vacuum drying chamber at 90 DEG C
Dry 12 h are put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source, it is wrapped
The surface for being overlying on SiC nanowire and SiC powder particle forms carbon coating, sets dump temperature as 870 DEG C.Finally to biscuit into
Row reaction-sintered, reaction-sintered carry out in vacuum non-pressure sintering furnace, it is ensured that vacuum degree is less than in burner hearth in entire sintering process
10 Pa, maximum temperature are set as 1570 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 8
The ethyl alcohol mechanical agitation of the phenolic resin of 5g and 10g are dissolved, yellow solution A is obtained.Wherein phenolic resin and ethyl alcohol
Mass ratio is 1:2.The SiC powder of the SiC nanowire of 15g and 85g are uniformly mixed, B powders, wherein SiC nanowire and SiC are obtained
Powder mass ratio is 3:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, the ball of SiC materials
For mill ball, the mass ratio of mill ball and powder material B is 5:1, Ball-milling Time is set as 2 h, obtains slurry C, drying, grinding and mistake
Sieve is granulated, and obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain ceramic mixing slurry
Expect E, slurry E is slowly instilled in the deionized water of large power supersonic oscillation, while high speed machine stirring makes hybrid ceramic starch
Expect rapid dispersion, obtains solution F.Wherein solution A and powder D mass ratioes are 3:1.F solution left standstills are precipitated into 36 min, remove part
Supernatant liquor obtains slurry G, PVA solution and slurry G mechanical agitations is obtained Solution H, granulation of then drying, grind and be sieved again obtains
The composite granule I coated to phenolic resin, wherein PVA solution are 20 with slurry G mass ratioes:1.By the compound of phenolic resin cladding
Powder I is poured into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, is centainly suppressed
The biscuit of density, the wherein pressure of hydraulic press are 28 MP.The biscuit of compression moulding is placed in vacuum drying chamber and is done at 88 DEG C
Dry 11 h is put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source, it is coated
Carbon coating is formed in the surface of SiC nanowire and SiC powder particle, sets dump temperature as 890 DEG C.Finally biscuit is carried out
Reaction-sintered, reaction-sintered carry out in vacuum non-pressure sintering furnace, it is ensured that vacuum degree is less than 10 in burner hearth in entire sintering process
Pa, maximum temperature are set as 1570 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 9
The ethyl alcohol mechanical agitation of the phenolic resin of 5g and 10g are dissolved, yellow solution A is obtained.Wherein phenolic resin and ethyl alcohol
Mass ratio is 1:2.The SiC powder of the SiC nanowire of 10g and 85g are uniformly mixed, B powders, wherein SiC nanowire and SiC are obtained
Powder mass ratio is 2:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, the ball of SiC materials
For mill ball, the mass ratio of mill ball and powder material B is 5:1, Ball-milling Time is set as 1.5h, obtains slurry C, drying, grinding and
Sieving is granulated, and obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain ceramic mixing
Slurry E slowly instills slurry E in the deionized water of large power supersonic oscillation, while high speed machine stirring makes hybrid ceramic
Slurry rapid dispersion obtains solution F.Wherein solution A and powder D mass ratioes are 3.5:1.F solution left standstills are precipitated into 42 min, are removed
Section top clear liquid obtains slurry G, and PVA solution and slurry G mechanical agitations are obtained Solution H, then dries, grinds and sieving is made again
Grain obtains the composite granule I of phenolic resin cladding, and wherein PVA solution and slurry G mass ratioes are 20:1.Phenolic resin is coated
Composite granule I pour into molding die, the compression moulding under the single effect of hydraulic press, and limit compacting height, obtain one
Determine the biscuit of pressed density, the wherein pressure of hydraulic press is 25 MP.The biscuit of compression moulding is placed in vacuum drying chamber 85
Dry 12 h at DEG C are put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source,
It is coated on SiC nanowire and the surface of SiC powder particle forms carbon coating, sets dump temperature as 860 DEG C.Finally to element
Base carries out reaction-sintered, and reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that vacuum degree in burner hearth in entire sintering process
Less than 10 Pa, maximum temperature is set as 1520 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 10
The ethyl alcohol mechanical agitation of the phenolic resin of 4g and 10g are dissolved, yellow solution A is obtained.Wherein phenolic resin and ethyl alcohol
Mass ratio is 1:2.5.The SiC powder of the SiC nanowire of 10g and 85g are uniformly mixed, obtain B powders, wherein SiC nanowire and
SiC powder mass ratioes are 2:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, SiC materials
Ball is mill ball, and the mass ratio of mill ball and powder material B is 5:1, Ball-milling Time is set as 2 h, obtains slurry C, drying, grinding
It is granulated with sieving, obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches ceramic mixed
Slurry E is closed, slurry E is slowly instilled in the deionized water of large power supersonic oscillation, while high speed machine stirring makes mixing make pottery
Porcelain slurry rapid dispersion, obtains solution F.Wherein solution A and powder D mass ratioes are 3:1.F solution left standstills are precipitated into 33 min, are removed
Section top clear liquid obtains slurry G, and PVA solution and slurry G mechanical agitations are obtained Solution H, then dries, grinds and sieving is made again
Grain obtains the composite granule I of phenolic resin cladding, and wherein PVA solution and slurry G mass ratioes are 18:1.Phenolic resin is coated
Composite granule I pour into molding die, the compression moulding under the single effect of hydraulic press, and limit compacting height, obtain one
Determine the biscuit of pressed density, the wherein pressure of hydraulic press is 27MP.The biscuit of compression moulding is placed in vacuum drying chamber 90
Dry 12 h at DEG C are put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source,
It is coated on SiC nanowire and the surface of SiC powder particle forms carbon coating, sets dump temperature as 890 DEG C.Finally to element
Base carries out reaction-sintered, and reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that vacuum degree in burner hearth in entire sintering process
Less than 10 Pa, maximum temperature is set as 1570 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Embodiment 11
The ethyl alcohol mechanical agitation of the phenolic resin of 4g and 8g are dissolved, yellow solution A is obtained.The wherein matter of phenolic resin and ethyl alcohol
Amount is than being 1:2.The SiC powder of the SiC nanowire of 15g and 85g are uniformly mixed, B powders, wherein SiC nanowire and SiC powder are obtained
Mass ratio is 3:17.Powder material B is put into planetary ball mill ball milling, using deionized water as ball-milling medium, the ball of SiC materials is
The mass ratio of mill ball, mill ball and powder material B is 5:1, Ball-milling Time is set as 1.5h, obtains slurry C, drying, grinding and mistake
Sieve is granulated, and obtains D powders.So that it is uniformly mixed through mechanical agitation and ultrasonic disperse solution A and powder D, matches to obtain ceramic mixing slurry
Expect E, slurry E is slowly instilled in the deionized water of large power supersonic oscillation, while high speed machine stirring makes hybrid ceramic starch
Expect rapid dispersion, obtains solution F.Wherein solution A and powder D mass ratioes are 3.5:1.F solution left standstills are precipitated into 43 min, removing portion
Divide supernatant liquor, obtain slurry G, PVA solution and slurry G mechanical agitations are obtained into Solution H, granulation of then drying, grind and be sieved again,
The composite granule I of phenolic resin cladding is obtained, wherein PVA solution and slurry G mass ratioes are 23:1.By answering for phenolic resin cladding
It closes powder I to pour into molding die, the compression moulding under the single effect of hydraulic press, and limits compacting height, obtain a level pressure
The biscuit of density processed, the wherein pressure of hydraulic press are 35 MP.The biscuit of compression moulding is placed in vacuum drying chamber at 90 DEG C
Dry 11 h are put into progress dumping processing in Muffle furnace after taking-up, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source, it is wrapped
The surface for being overlying on SiC nanowire and SiC powder particle forms carbon coating, and it is 900 DEG C to determine dumping maximum temperature.Finally to biscuit
Reaction-sintered is carried out, reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that vacuum degree is small in burner hearth in entire sintering process
In 10 Pa, maximum temperature is set as 1550 DEG C.The pattern of product, institutional framework, performance etc. are same as Example 1.
Claims (10)
1. a kind of method preparing SiC nanowire intensified response sintered silicon carbide ceramics based composites, it is characterised in that：The party
Method uses phenolic resin to coat carbon source using phenolic resin as the single carbon source of reaction system, and table is carried out to SiC nanowire
Face is modified, and forms carbon coating SiC nanowire, it is dispersed among SiC ceramic precast body, is then prepared by reaction-sintered
Enhance SiC ceramic based composites at SiC nano fiber.
2. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites of preparing according to claim 1
Method, it is characterised in that：This method includes the following steps：
Step 1) first dissolves phenolic resin and ethyl alcohol mechanical agitation, obtains yellow solution A, the wherein matter of phenolic resin and ethyl alcohol
Amount is than being 1:2-4；
SiC nanowire and SiC powder are uniformly mixed by step 2), obtain B powders, and wherein SiC nanowire and SiC powder mass ratioes is 2-
3:17；
Powder material B is put into planetary ball mill ball milling by step 3), and using deionized water as ball-milling medium, the ball of SiC materials is to grind
The mass ratio of abrading-ball, mill ball and powder material B is 5:1, Ball-milling Time is set as 1.5-2 h, obtains slurry C, drying, grinding and mistake
Sieve is granulated, and obtains D powders；
Solution A and powder D are made it be uniformly mixed by step 4) through mechanical agitation and ultrasonic disperse, match to obtain ceramic mixed slurry E, will
Slurry E is instilled in the deionized water of sonic oscillation, while mechanical agitation makes hybrid ceramic slurry disperse, and obtains solution F, wherein solution
A and powder D mass ratioes are 2-5:1；
F solution left standstills are precipitated 30-45min by step 5), are removed section top clear liquid, slurry G are obtained, by PVA solution and slurry G machines
Tool stirs to obtain Solution H, granulation of then drying, grind and be sieved again, obtains the composite granule I of phenolic resin cladding, and wherein PVA is molten
Liquid is 15-25 with slurry G mass ratioes:1；
Step 6) pours into the composite granule I that phenolic resin coats in molding die, is pressed under the single effect of hydraulic press
Type, and compacting height is limited, the biscuit of compression moulding is obtained, the wherein pressure of hydraulic press is the MP of 20 MP~35；
The biscuit of compression moulding is placed in vacuum drying chamber at 85 DEG C -90 DEG C dry 10-12h by step 7), is put into after taking-up
Dumping processing is carried out in Muffle furnace, phenolic resin, which is carbonized to crack at high temperature, becomes carbon source, it is coated on SiC nanowire and SiC
The surface of powder granule forms carbon coating, sets dump temperature as 850 DEG C -900 DEG C；
Step 8) finally carries out reaction-sintered to biscuit, and reaction-sintered carries out in vacuum non-pressure sintering furnace, it is ensured that entire sintering
Vacuum degree is less than 10 Pa in burner hearth in the process, and maximum temperature is 1500 DEG C -1600 DEG C.
3. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites of preparing according to claim 2
Method, it is characterised in that：Preferably, the mass ratio of phenolic resin described in step 1) and ethyl alcohol is 1:2；Phenolic resin should select
Water-insoluble phenolic resin.
4. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites of preparing according to claim 2
Method, it is characterised in that：Preferably, SiC nanowire described in step 2) and SiC powder mass ratioes are 3:17；SiC nanowire
Selected from the high-purity beta-SiC nano-wire of thermodynamically stable monocrystalline；SiC powder diameters are 0.1 ~ 30 micron.
5. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites of preparing according to claim 2
Method, it is characterised in that：Preferably, abrading-ball described in step 3) and the mass ratio of powder material B are 5:When 1, Ball-milling Time setting
For 1.5h.
6. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites of preparing according to claim 2
Method, it is characterised in that：Preferably, solution A described in step 4) and powder D mass ratioes are 3:1.
7. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites of preparing according to claim 2
Method, it is characterised in that：Preferably, F solution left standstills described in step 5) precipitates 30min, PVA solution and slurry G mass ratioes
It is 20:1.
8. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites are prepared according to claim 2
Method, it is characterised in that：Preferably, the pressure of hydraulic press described in step 6) is 20 MP.
9. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites of preparing according to claim 2
Method, it is characterised in that：Preferably, drying 12 h, the dumping highest temperature described in step 7) at 90 DEG C in vacuum drying chamber
Degree is 900 DEG C.
10. a kind of SiC nanowire intensified response sintered silicon carbide ceramics based composites of preparing according to claim 2
Method, it is characterised in that：Preferably, vacuum degree is less than 10 Pa in burner hearth described in step 8), maximum temperature is 1500 DEG C.
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| CN116217242A (en) * | 2022-12-29 | 2023-06-06 | 兴核科学研究(福建)有限责任公司 | Preparation method of silicon nitride ceramic slurry suitable for photo-curing forming process |
| CN116217242B (en) * | 2022-12-29 | 2024-02-09 | 兴核科学研究(福建)有限责任公司 | Preparation method of silicon nitride ceramic slurry suitable for photo-curing forming process |
| CN116924771A (en) * | 2023-08-15 | 2023-10-24 | 应县通盛陶瓷有限公司 | Domestic ceramic with smooth surface and preparation process thereof |
| CN117164340A (en) * | 2023-11-02 | 2023-12-05 | 北京利尔高温材料股份有限公司 | AlON and Al 2 O 3 -ZrO 2 Composite toughening phase, low-carbon magnesia carbon brick and preparation method thereof |
| CN117164340B (en) * | 2023-11-02 | 2024-03-05 | 洛阳利尔功能材料有限公司 | AlON and Al 2 O 3 -ZrO 2 Composite toughening phase, low-carbon magnesia carbon brick and preparation method thereof |
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