CN110357648A - A method of preparing multistage multiple dimensioned fiber reinforced ceramic matric composite - Google Patents
A method of preparing multistage multiple dimensioned fiber reinforced ceramic matric composite Download PDFInfo
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- CN110357648A CN110357648A CN201910618383.1A CN201910618383A CN110357648A CN 110357648 A CN110357648 A CN 110357648A CN 201910618383 A CN201910618383 A CN 201910618383A CN 110357648 A CN110357648 A CN 110357648A
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- 239000000835 fiber Substances 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000002131 composite material Substances 0.000 title claims abstract description 45
- 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 title claims abstract description 39
- 239000011226 reinforced ceramic Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 claims abstract description 35
- 230000002787 reinforcement Effects 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000011259 mixed solution Substances 0.000 claims abstract description 11
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 51
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 39
- 239000010410 layer Substances 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 239000002759 woven fabric Substances 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 238000011065 in-situ storage Methods 0.000 claims description 9
- 239000002243 precursor Substances 0.000 claims description 7
- 239000002296 pyrolytic carbon Substances 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 238000000498 ball milling Methods 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229960004756 ethanol Drugs 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 230000004927 fusion Effects 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 239000005543 nano-size silicon particle Substances 0.000 claims description 4
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000002356 single layer Substances 0.000 claims description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000010574 gas phase reaction Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 238000009288 screen filtration Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract 1
- 238000003763 carbonization Methods 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 13
- 238000001764 infiltration Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 230000008595 infiltration Effects 0.000 description 4
- 239000002121 nanofiber Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 206010016256 fatigue Diseases 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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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
- C04B35/515—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
- C04B35/573—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 obtained by reaction sintering or recrystallisation
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Abstract
The present invention is a kind of method for preparing multistage multiple dimensioned fiber reinforced ceramic matric composite, in this method, first in fiber surface deposited interfacial layer, and nanometer reinforcement is prepared in the fiber surface with interfacial TCO layer, obtain multistage multiple dimensioned fiber, mixed solution is prepared simultaneously as slurry, and slurry is introduced into multistage multiple dimensioned fiber by wet process preimpregnation preparation method for material and obtains prepreg；By prepreg cutting, paving, hot-forming obtain precast body；Precast body high temperature carbonization is obtained into porous body, melting siliconising is finally carried out using silicon powder embedding porous body, obtains multistage multiple dimensioned fiber reinforced ceramic matric composite；The density of the multiple dimensioned fiber reinforced ceramic matric composite of multistage prepared using the above method is up to 2.7g/cm3, within 5%, bending strength and fracture toughness have to be significantly improved controlled porosity.
Description
Technical field
The present invention is a kind of method for preparing multistage multiple dimensioned fiber reinforced ceramic matric composite, belongs to fiber reinforced pottery
The preparation technical field of porcelain based composites.
Background technique
Ceramic matric composite refers to that dispersed phase is introduced in ceramic matrix forms reinforcement, and ceramic matrix is continuous phase
Composite material, the heat resistance having had, density is low, insensitive to crackle, catastrophic failure will not occur, therefore sending out
Have in the engine thermals end pieces such as motivation blade, machine lock, the high low pressure turbine disk, flameholder and ejector exhaust pipe important
Using effectively improving the working efficiency of engine.
Continuous Fiber Reinforced Ceramic Matrix Composites, hole and crackle during applied at elevated temperature due to being formed in matrix
The defects of, cause material fragility big, damage toughness is insufficient, and fatigue life is short, it is difficult to meet next-generation engine material fatigability
The demand of energy.Therefore research attempts using the technological approaches such as nanofiber multistage toughening at this stage, exploitation is more resistant to high temperature, higher
The ceramic matric composite of damage tolerance.
Nanofiber is introduced into material matrix as the second reinforcement, can pass through the toughenings machine such as crack deflection and bridging
System, the multiple dimensioned toughening effect for improving reinforced phase, improves oxidation resistent susceptibility, mechanical property of ceramic matric composite etc..
In recent years, related research institutes both domestic and external prepared the ceramic base of unidirectional reinforcement toughening in prepreg infiltration process
Major progress is achieved in terms of composite material, using the ceramic matric composite and component of technique preparation have reached it is higher at
Ripe degree, GE company, the U.S. has been examined by application layer using the ceramic base composite material member of technique preparation, therefore is developed pre-
The process of the multistage multiple dimensioned fiber reinforced ceramic matric composite of leaching material infiltration process preparation will have great importance.
Summary of the invention
The present invention is exactly directed to next-generation engine for the demand of ceramic matric composite more high fatigue property, proposes
A kind of method of the multistage multiple dimensioned fiber reinforced ceramic matric composite of prepreg infiltration process preparation, i.e., introduce on fiber and receive
Meter level reinforcement prepares multistage multiple dimensioned fiber, then prepares multistage multiple dimensioned fiber using prepreg-infiltration process and increases
Tough ceramic matric composite develops the ceramic matric composite more resistant to high temperature, more high damage tolerance.
The purpose of the present invention is what is realized by following technological approaches:
It is as follows that this kind prepares the step of method of multistage multiple dimensioned fiber reinforced ceramic matric composite:
Step 1: the preparation of precursor slurry
Silicon carbide powder, phenolic resin, silicon powder are uniformly mixed with ethyl alcohol according to 1: 1~3: 1~3: 5~10 mass ratioes,
Precursor slurry is obtained after ball milling, for use；
Step 2: preparing boundary layer on continuous-filament woven fabric surface
The type of boundary layer is the compound of one or more of pyrolytic carbon (PyC), boron nitride (BN) or silicon carbide (SiC)
Boundary layer；
Step 3: preparing multistage multi-scale reinforcing body on continuous-filament woven fabric surface
Step 4: the preparation of multistage multiple dimensioned fiber prepreg material
After the precursor slurry prepared in step 1 is introduced into completion step 3 by wet process prepreg preparation process
Continuous-filament woven fabric in, obtain multistage multiple dimensioned fiber prepreg material；
Step 5: the preparation of multistage multiple dimensioned fiber reinforced precast body
The multiple dimensioned fiber prepreg material of multistage in step 4 is placed in heat pressing and molding mold and is formed, hot-forming temperature
It is 150~400 DEG C, briquetting pressure is about 1~5MPa, and the dwell time is about 1~5h, and multistage multiple dimensioned fibre is obtained after pressure maintaining
Tie up toughening precast body；
Step 6: the preparation of multistage multiple dimensioned fiber reinforcement porous body
The multiple dimensioned fiber reinforced precast body of multistage that step 5 obtains is put into high temperature furnace and is heated to 1200 DEG C, is obtained more
The multiple dimensioned fiber reinforcement porous body of grade；
Step 7: the preparation of multistage multiple dimensioned fiber reinforced ceramic matric composite
The multiple dimensioned fiber reinforcement porous body of multistage prepared in step 6 is put into graphite crucible, is seeped using high-temperature fusion
The mode of silicon obtains multistage multiple dimensioned fiber reinforced ceramic matric composite.
In a kind of implementation, the Ball-milling Time in step 1 is 1~5 hour.
In a kind of implementation, single layer interfacial layer thickness described in step 2 is 100~500nm, and boundary layer overall thickness is about 1
~2 μm.
In a kind of implementation, the fiber is silicon carbide fibre or carbon fiber, and the continuous-filament woven fabric is that two dimension is fine
Tie up fabric or unidirectional narrow fabrics.
In a kind of implementation, in the method for the multistage multi-scale reinforcing body of continuous-filament woven fabric surface preparation described in step 3
For growth in situ nanometer silicon carbide fiber, introduces nanometer silicon carbide fiber or introduce nanometer silicon carbide whiskers.
Further, the growth in situ nanometer silicon carbide fiber is with Si powder, SiO2Powder, C are raw material, using gas phase in situ
Reaction method grows nano SiC fiber in continuous fiber surface, and the reaction temperature for preparing nano SiC fiber is 1400 DEG C -1500 DEG C.
Further, the introducing nanometer silicon carbide fiber or introducing nanometer silicon carbide whiskers are to add it to dehydrated alcohol
In the mixed solution of polyethylene glycol, the mass ratio of dehydrated alcohol and polyethylene glycol is 20: 1~5, using the method for ultrasonic vibration
Disperse 1~5h, use glass to stir during ultrasonic disperse, completes the screen filtration for using 100~500 mesh after dispersing, obtain
To nanometer silicon carbide fiber or nanometer silicon carbide whiskers mixed solution, mixed solution is then brushed into continuous-filament woven fabric surface
On, it dries.
In a kind of implementation, introducing described in step 4 is using the method repeatedly brushed, then by prepreg in room
10~30h is dried under temperature.
In a kind of implementation, hot-forming mode described in step 5 is that hot press is pressed and molded, autoclave is hot pressed into
Type or vacuum bag are hot-forming.
In a kind of implementation, the technological temperature for melting siliconising is 1400~1800 DEG C.
The advantages of technical solution of the present invention and feature are as follows:
1. the present invention prepares multistage multiple dimensioned fibre by preparing nanometer silicon carbide reinforcement on continuous-filament woven fabric surface
Dimension, and using the multistage multiple dimensioned fiber reinforced ceramic matric composite of prepreg infiltration process preparation, process cycle is shorter, controllably
Property it is higher, in engineer application have apparent advantage；
2. the present invention improves nano silicon carbide by growing or introducing nanometer reinforcement in continuous-filament woven fabric surface in situ
The uniformity that silica fibre or whisker are distributed in multistage multiple dimensioned fiber reinforced ceramic matric composite, convenient for control nanometer enhancing
The content of body has apparent advantage in implementation process；
3. dispersing nanometer silicon carbide reinforcement in organic solvent present invention introduces when nanometer reinforcement, avoiding and expecting
Nanometer reinforcement is caused to damage due to factors such as mechanical ball mills in slurry mixing, also avoid nanofiber in slurry with solid
The tangled up and knotted of particle utmostly plays the toughening effect of nanofiber, thus also with apparent excellent on toughening effect
Gesture；
Specific embodiment
Embodiment 1
It is as follows that this kind prepares the step of method of multistage multiple dimensioned fiber reinforced ceramic matric composite:
Step 1: silicon carbide powder, phenolic resin, silicon powder than are uniformly mixed with ethyl alcohol according to 1:3:1:5 mass fraction,
Obtain slurry within ball milling 5 hours, for use；
Step 2: being deposited as continuous fiber reinforcement in silicon carbide fibre fabric surface using silicon carbide fibre fabric
BN/SiC/PyC boundary layer, single layer interfacial layer thickness are about 400nm；
Step 3: with Si powder and SiO2Powder is raw material, using in continuous SiC fiber fabric surface growth in situ nano SiC
Multistage multiple dimensioned fiber is prepared in fiber, and the reaction temperature that gas phase reaction in situ prepares nano SiC fiber is 1450 DEG C；
Step 4: by wet process prepreg preparation process by slurry provisioned in step 1 uniformly brushes arrive step 3 it is made
On the standby multiple dimensioned fiber of multistage.It needs strict control to introduce the amount of slurry in dipping process, using the method repeatedly brushed, protects
Demonstrate,prove the uniformity of slurry distribution in prepreg；Then by prepreg naturally dry 12h, multistage multiple dimensioned SiC fiber prepreg is obtained
Material；
Step 5: the multiple dimensioned SiC fiber prepreg material of multistage prepared in step 4 is cut, paving；And it is paving is good
Prepreg is placed in compression molding die and is pressed and molded.Forming temperature is 300 DEG C, and briquetting pressure is about 5MPa, dwell time
About 3h obtains multistage multiple dimensioned fiber reinforced precast body；
It is obtained Step 6: the multiple dimensioned fiber reinforced precast body of multistage prepared in step 5 is put into heat treatment in high temperature furnace
The porous body of multistage multiple dimensioned silicon carbide fibre enhancing, the preparation temperature of porous body is about 1200 DEG C；
Step 7: the porous body prepared in step 6 is put into graphite crucible, obtained by the way of high-temperature fusion siliconising
To the ceramic matric composite of multistage multiple dimensioned toughening, melting siliconising preparation temperature is about 1500 DEG C.After the technique, obtain
The fine and close multiple dimensioned fiber reinforced ceramic matric composite of multistage.
After the technique, the fine and close multiple dimensioned fiber reinforced ceramic matric composite of multistage is obtained, density is reachable
2.7g/cm3, within 5%, the fracture toughness and fracture elongation of composite material have to be significantly improved controlled porosity.
Embodiment 2
It is as follows that this kind prepares the step of method of multistage multiple dimensioned fiber reinforced ceramic matric composite:
Step 1: silicon carbide powder, phenolic resin, silicon powder and ethyl alcohol is more mixed than uniformly according to 1:2:1.5:7 mass fraction
It closes, and ball milling 5 hours obtain slurry, for use；
Step 2: being deposited as continuous fiber reinforcement in silicon carbide fibre fabric surface using silicon carbide fibre fabric
PyC/SiC/PyC boundary layer, single layer interfacial layer thickness are about 500nm；
Step 3: the mixed solution of dehydrated alcohol and polyethylene glycol is prepared than the ratio for 20:1 according to mass fraction, and
Nano SiC fiber is added in mixed solution, 2h is dispersed using ultrasonic vibration+churned mechanically method, obtains nano silicon carbide
Silica fibre mixed solution；
Step 4: mixed solution obtained by step 3 is evenly coated in continuous carbofrax fibre fabric surface, and by silicon carbide
Fabric dries, and multistage multiple dimensioned silicon carbide fibre is obtained after solvent volatilizees completely；
Step 5: precursor slurry provisioned in step 1 is homogeneously introduced to step by wet process prepreg preparation process
On the multiple dimensioned silicon carbide fibre of multistage prepared by four.Strict control is needed to introduce the amount of slurry in dipping process, using multiple
The method of brushing guarantees the uniformity of slurry distribution in prepreg；Then by prepreg naturally dry 12h, multistage more rulers are obtained
Spend silicon carbide fibre prepreg；
Step 6: the multiple dimensioned silicon carbide fibre prepreg of multistage prepared in step 5 is cut, paving；And it is paving is good
Prepreg be placed in heat pressing and molding mold, it is hot-forming using autoclave.Being pressed and molded temperature is 300 DEG C, briquetting pressure
About 5MPa, dwell time are about 3h, obtain multistage multiple dimensioned toughening precast body.
It is heat-treated to obtain multistage more rulers Step 7: the resin base precast body prepared in step 6 is put into high temperature furnace high temperature
Silicon carbide fibre toughening porous body is spent, the preparation temperature of porous body is about 1200 DEG C.
Step 8: the porous body prepared in step 7 is put into graphite crucible, obtained by the way of high-temperature fusion siliconising
To multistage multiple dimensioned fiber reinforced ceramic matric composite, melting siliconising preparation temperature is about 1500 DEG C.After the technique,
Obtain the ceramic matric composite of the closely knit multiple dimensioned toughening of multistage.
Claims (10)
1. a kind of method for preparing multistage multiple dimensioned fiber reinforced ceramic matric composite, it is characterised in that: the step of this method
It is as follows:
Step 1: the preparation of precursor slurry
Silicon carbide powder, phenolic resin, silicon powder are uniformly mixed with ethyl alcohol according to 1: 1~3: 1~3: 5~10 mass ratioes, ball milling
After obtain precursor slurry, for use；
Step 2: preparing boundary layer on continuous-filament woven fabric surface
The type of boundary layer is the compound interface of one or more of pyrolytic carbon (PyC), boron nitride (BN) or silicon carbide (SiC)
Layer；
Step 3: preparing multistage multi-scale reinforcing body on continuous-filament woven fabric surface
Step 4: the preparation of multistage multiple dimensioned fiber prepreg material
The precursor slurry prepared in step 1 is introduced into the company after completing step 3 by wet process prepreg preparation process
In continuous fabric, multistage multiple dimensioned fiber prepreg material is obtained；
Step 5: the preparation of multistage multiple dimensioned fiber reinforced precast body
The multiple dimensioned fiber prepreg material of multistage in step 4 is placed in heat pressing and molding mold and is formed, hot-forming temperature is
150~400 DEG C, briquetting pressure is about 1~5MPa, and the dwell time is about 1~5h, and multistage multiple dimensioned fiber is obtained after pressure maintaining
Toughening precast body；
Step 6: the preparation of multistage multiple dimensioned fiber reinforcement porous body
The multiple dimensioned fiber reinforced precast body of multistage that step 5 obtains is put into high temperature furnace and is heated to 1200 DEG C, it is more to obtain multistage
Scale fiber reinforcement porous body；
Step 7: the preparation of multistage multiple dimensioned fiber reinforced ceramic matric composite
The multiple dimensioned fiber reinforcement porous body of multistage prepared in step 6 is put into graphite crucible, using high-temperature fusion siliconising
Mode obtains multistage multiple dimensioned fiber reinforced ceramic matric composite.
2. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 1, feature exist
In: the Ball-milling Time in step 1 is 1~5 hour.
3. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 1, feature exist
In: single layer interfacial layer thickness described in step 2 is 100~500nm, and boundary layer overall thickness is about 1~2 μm.
4. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 1, feature exist
In: the fiber is silicon carbide fibre or carbon fiber, and the continuous-filament woven fabric is two-dimensional fiber fabric or unidirectional narrow fabrics.
5. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 1, feature exist
In: it in the method that continuous-filament woven fabric surface prepares multistage multi-scale reinforcing body is growth in situ nano silicon carbide described in step 3
Silica fibre introduces nanometer silicon carbide fiber or introduces nanometer silicon carbide whiskers.
6. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 5, feature exist
In: the growth in situ nanometer silicon carbide fiber is with Si powder, SiO2Powder, C are raw material, using gas-phase reaction method in situ continuous
Fiber surface grows nano SiC fiber, and the reaction temperature for preparing nano SiC fiber is 1400 DEG C -1500 DEG C.
7. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 5, feature exist
In:
The introducing nanometer silicon carbide fiber or introducing nanometer silicon carbide whiskers are to add it to dehydrated alcohol and polyethylene glycol
Mixed solution in, the mass ratio of dehydrated alcohol and polyethylene glycol is 20: 1~5,1~5h is dispersed using the method for ultrasonic vibration,
It uses glass to stir during ultrasonic disperse, completes the screen filtration for using 100~500 mesh after dispersing, obtain nano silicon carbide
Silica fibre or nanometer silicon carbide whiskers mixed solution, mixed solution is then brushed on continuous-filament woven fabric surface, dry.
8. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 1, feature exist
In: introducing described in step 4 is that prepreg is then dried 10~30h at room temperature using the method repeatedly brushed.
9. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 1, feature exist
In: hot-forming mode described in step 5 is hot press compression molding, autoclave is hot-forming or vacuum bag is hot-forming.
10. the method for the multistage multiple dimensioned fiber reinforced ceramic matric composite of preparation according to claim 1, feature exist
In: the technological temperature for melting siliconising is 1400~1800 DEG C.
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| CN111170754A (en) * | 2020-02-08 | 2020-05-19 | 西北工业大学 | Composite material with Si-Y-C ternary ceramic matrix and preparation method thereof |
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| CN116768642A (en) * | 2023-08-17 | 2023-09-19 | 成都飞机工业（集团）有限责任公司 | Preparation method of long spiral fiber toughened ceramic matrix composite |
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