CN1931785A - Short carbon fiber reinforced composite BaAl2Si2O8 material and its prepn process - Google Patents
Short carbon fiber reinforced composite BaAl2Si2O8 material and its prepn process Download PDFInfo
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- CN1931785A CN1931785A CN 200610010505 CN200610010505A CN1931785A CN 1931785 A CN1931785 A CN 1931785A CN 200610010505 CN200610010505 CN 200610010505 CN 200610010505 A CN200610010505 A CN 200610010505A CN 1931785 A CN1931785 A CN 1931785A
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Abstract
The present invention is short carbon fiber reinforced BaAl2Si2O8 (BAS) composite material and its preparation process. The composite material with raised bending strength and fracture toughness includes BAS and short carbon fiber as reinforcing component in 1-50 vol%. The preparation process includes the following steps: 1. cutting short carbon fiber into 1-3 mm length, ultrasonic treatment to form fiber sheet, re-cutting to 1-3 mm length, and filtering off broken slag; 2. mixing BAS powder with anhydrous ethanol or isopropanol in a plastic bottle to form slurry; 3. adding short carbon fiber into the slurry via ultrasonic vibrating and drying in an oven to fiber ball with coated powder material; and 4. hot pressing fiber ball in mold and sintering. The composite material has raised room temperature and high temperature mechanical performance, improved heat shock resistance and high ablation resistance.
Description
Technical field
The present invention relates to a kind of BAS matrix material and preparation technology thereof, particularly a kind of short carbon fiber strengthens the hot-pressing sintering technique of BAS Reinforced Glass-Ceramic Composites and this polynary mixing reinforced composite materials.
Background technology
Glass-ceramic has the characteristics of high-melting-point, low thermal coefficient of expansion, good in oxidation resistance, and easy-formation, is the hypersonic speed cruising missile solar heat protection of Ma 〉=5 and the preferred substrate [US7982535-N that the missile propulsive plant hot-end component is used refractory ceramics composite material; US5256610-A].With the celsian-felspar is BAS (the molecular formula BaAl of principal crystalline phase
2Si
2O
8) glass-ceramic (BaOAl
2O
32SiO
2) fusing point is up to 1760 ℃, be the matrix material of matrix, use temperature is expected to reach 1500 ℃.Harbin Institute of Technology and Northwestern Polytechnical University carry out BAS glass-ceramic and composite study work thereof from nineteen ninety-five always, have successfully prepared the SiC of excellent performance
w/ BAS, SiC
p/ BAS and β-Si
3N
4The brilliant original position of rod strengthens the BAS matrix material, but heat-shock resistance and anti-ablation property still can not satisfy military requirement.
Fiber can significantly improve the anti-ablation property of anti-thermal shock of matrix material.U.S. NASA has successfully prepared BN/SiC coating Hi-Nicalon continuous fibre and has strengthened the celsian-felspar based composite ceramic material, flexural strength is up to 960MPa, the correlation technique application some patents of invention [US5281559-A, US8221128-N, US8221128-N] that military background is arranged.Yet at high-temperature area more than 1200 ℃, SiC polycrystalline fibre microstructure slowly changes, and will cause the matrix material creep.The exploitation active time surpasses 1000 hours high temperature resistant structure ceramics, is suitable for the enhancing body and has only carbon fiber.Domestic little Wei of the Yin Dynasty etc. strengthen the work [Materials Science and Engineering 2000 (69) 74-76] that the BAS Reinforced Glass-Ceramic Composites has been carried out some explorations aspect preparing at continuous carbon fibre.
In addition carbon fiber strengthens celsian-felspar and matrix material is studied seldom, and wherein topmost upward journey technical problem is the thermal mismatch problem of fiber and matrix.The C fiber expands vertically with cooling, easily forms crackle in matrices of composite material.Therefore reduce C
fWith BAS (or BSAS) [Materials Science andEngineering A 200334223-27; Ceramics International 2,002 28 527-540] thermal stresses of matrix can give full play to the highly malleablized effect of C fiber to BAS (or BSAS) glass-ceramic.
Summary of the invention
In order to suppress the generation of refractory ceramics composite material matrix tiny crack, improve its bending strength and fracture toughness property, the invention provides a kind of short carbon fiber and strengthen BaAl
2Si
2O
8Matrix material and preparation method thereof.
Short carbon fiber of the present invention strengthens BaAl
2Si
2O
8Matrix material comprises that carbon chopped fiber strengthens body and BAS, wherein the volume percent of carbon chopped fiber enhancing body is 1%～50%, its preparation method is: a, the carbon fiber weak point is cut to 1～3mm, with the dehydrated alcohol is medium ultra-sonic dispersion 20～40min, treat that carbon fiber is reunited and pull fibre plate in flakes out, prescind the elimination disintegrating slag for the second time according to 1～3mm progress row; B, take by weighing BaAl
2Si
2O
8Powder stock in the Plastic Bottle of packing into, adds the dehydrated alcohol or the Virahol of 2～50 times of volumes, wet mixing, pulping; C, add the carbon fiber that prescinds according to said ratio in slurry, ultrasonic concussion 10～30min puts into the fibrous nodules that oven drying becomes the parcel powder then; D, fibrous nodules is put into mould for hot pressed sintering, the control sintering temperature is that 1200～1700 ℃, sintering pressure are that 10～30MPa, sintering time are 30～60min, and sintering atmosphere is 0.1MPa nitrogen or vacuum.
The present invention is that background has been developed the uniform fine and close C of Fiber Distribution with aerospace engine and the anti-heat problem of high Mach number cruising missile etc.
Sf/ BAS and C
Sf/ BSAS Reinforced Glass-Ceramic Composites proposes to add Si
3N
4Strengthen matrix, add nanometer ZrO
2Improve the thermal mismatching between carbon fiber and the matrix, suppressed the generation of matrices of composite material tiny crack, bending strength and fracture toughness property are greatly improved.During fracture of composite materials, crack propagation is subjected to the obstruction of BAS matrix and fiber simultaneously, and fibre breakage, extracts to load-displacement curve and cause a large amount of sawtooth effects.After load reached peak value, matrix material lost efficacy, but not fracture, the bridging effect of fiber makes matrix material show the pseudoplasticity fracture mode, has avoided no sign brittle failure.This material can satisfy space flight solar heat protection service requirements, and the characteristics of organizational structure and the mechanical property of matrix material are seen Fig. 1～Fig. 9.
Description of drawings
Fig. 1 is the 30vol%C of 1550 ℃/25MPa/1h hot pressed sintering preparation
SfThe SEM of/BSAS matrix material organizes photo (being parallel to hot pressing face), and Fig. 2 is the 30vol%C of 1550 ℃/25MPa/1h hot pressed sintering preparation
SfThe SEM of/BSAS matrix material organizes photo (perpendicular to hot pressing face), and Fig. 3 is the (20vol%C of 1600 ℃/20MPa/1h hot pressed sintering preparation
Sf/+30vol%ZrO
2p)/BSAS compound SEM organization chart (being parallel to hot pressing face), Fig. 4 are the (20vol%C of 1600 ℃/20MPa/1h hot pressed sintering preparation
Sf+ 30vol%ZrO
2p)/BSAS compound SEM organizes photo (perpendicular to hot pressing face), and Fig. 5 is the 30vol%C of 1550 ℃/25MPa/1h hot pressed sintering preparation
SfThe TEM of/BAS matrix material organizes photo, and Fig. 6 is the C of 1550 ℃/25MPa/1h hot pressed sintering preparation
SfThe bending strength of/BAS matrix material and the graph of a relation of fibre content, Fig. 7 are the C of 1550 ℃/25MPa/1h hot pressed sintering preparation
SfLoad-the displacement curve of/BAS matrix material, Fig. 8 are the 40vol%C of 1550 ℃/25MPa/1h hot pressed sintering preparation
SfThe thermal expansion curve of/BAS matrix material, Fig. 9 are the (20vol%C of 1600 ℃/20MPa/1h hot pressed sintering preparation
Sf+ 35vol%Si
3N
4pThe fiber crack propagation path photo of)/BSAS matrix material.
Embodiment
Embodiment one: the carbon chopped fiber of present embodiment strengthens BAS (or BSAS) matrix material to be made up of carbon chopped fiber and BAS, the unified C that is abbreviated as
Sf/ BAS matrix material, its characteristics of organizational structure is: the volume percent of carbon chopped fiber enhancing body is 1%～50% in matrix material, and optimum value is 10%～30%.Carbon fiber evenly or relatively is evenly distributed in the BAS matrix.
Embodiment two: the silicon nitride particle-carbon chopped fiber of present embodiment mixes enhancing BAS (or BSAS) matrix material and is made up of carbon chopped fiber, silicon nitride particle and BAS, the unified (C that is abbreviated as
Sf+ Si
3N
4p)/BAS matrix material, its characteristics of organizational structure is: the volume percent of carbon chopped fiber enhancing body is 1%～50% in matrix material, and optimum value is 10%～30%.Si
3N
4The particulate volume percent is 1%～50%, and optimum value is 10%～30%.Carbon fiber and Si
3N
4Uniform particles or relatively be evenly distributed in the BAS matrix.Si
3N
4Particulate fraction or all change long bar-shaped β-Si into
3N
4The BAS matrix is six sides phase or monocline phase by service requirements.
Embodiment three: the nano zircite particle-carbon chopped fiber of present embodiment mixes enhancing BAS (or BSAS) matrix material and is made up of carbon chopped fiber, nano zircite particle and BAS, the unified (C that is abbreviated as
Sf+ ZrO
2p)/BAS matrix material, its characteristics of organizational structure is: the volume percent of carbon chopped fiber enhancing body is 1%50% in matrix material, and optimum value is 10%～30%.Nano zircite particulate volume percent is 1%～50%, and optimum value is 10%～30%.Carbon fiber and nano zircite uniform particles or relatively be evenly distributed in the BAS matrix.The BAS matrix is six sides phase or monocline phase by service requirements.
Embodiment four: the silicon nitride of present embodiment, two kinds of particles of nano zircite and the compound enhancing BAS of short carbon fiber ternary (or BSAS) based composites are made up of carbon chopped fiber, silicon nitride, nano zircite particle and BAS.In matrix material, the volume percent that carbon chopped fiber strengthens body is 1%～50%, and optimum value is 10%～30%.The total volume percent of particle is 1%～50%, and optimum value is 10%～30%.
Embodiment five: present embodiment prepares the short carbon fiber reinforced composite according to following steps:
1, raw material is handled
(a) BAS raw material
The molecular formula of BAS is BaAl
2Si
2O
8Can adopt solution chemistry method synthetic BAS non-crystalline state powder [Ye Feng Northwestern Polytechnical University post-doctoral research work report in May, 1997], its particle diameter is about 0.1 μ m～50 μ m, preferably less than 5 μ m; Also can use BaCO
3, Al
2O
3, SiO
2Powder, reaction in sintering process and generate BAS, preferably each powder purity is greater than 99.5%, and particle diameter is less than 5 μ m.
The molecular formula of BSAS is Sr
xBa
1-xAl
2Si
2O
8(0＜x＜1) can adopt solution chemistry method synthetic BSAS[clock Lian Bing Harbin Institute of Technology master thesis 2006], its particle diameter is about 0.1 μ m～50 μ m, preferably less than 5 μ m; Also can use BaCO
3, SrCO
3, Al
2O
3, SiO
2Powder, reaction in sintering process and generate BSAS, preferably each powder purity is greater than 99.5%, and particle diameter is less than 5 μ m.
(b) carbon fiber
Tensile strength is not less than 2000MPa, and Young's modulus is not less than 200GPa, diameter 3-10 μ m.
(c) Si
3N
4Raw material
Si
3N
4Oxygen level is less than 2wt%, and median size is not more than 5 μ m.
(d) ZrO
2Raw material
Nanometer ZrO
2The condition that needs to satisfy is to be the t phase more than 600 ℃, is the m phase below 600 ℃, and purity is not less than 99.9%.
2, the processing of staple fibre and fiber and powder mixes
(a) processing of staple fibre
1. the carbon fiber weak point is cut to 1～3mm, with acetone flush away surface impurity; Perhaps in the nitric acid of 60-70%, soaked 24 hours, clean residual nitric acid.
2. be medium ultra-sonic dispersion 20-40min with the dehydrated alcohol, treat the carbon fiber reunion in flakes.
3. pull fibre plate out and prescind the elimination disintegrating slag according to 1～3mm progress row for the second time.
(b) preparation of slip
Take by weighing powder stock according to embodiment one～four arbitrary proportioning, in the Plastic Bottle of packing into, add the dehydrated alcohol or the Virahol of 2-50 times of volume, with ZrO
2Ceramic Balls is medium ball milling wet mixing 24 hours, pulping.
(c) staple fibre mixes with slip
Add the carbon fiber that prescinds in the slurry, ultrasonic concussion 10-30min puts into the fibrous nodules (diameter about 1-2mm) of 60 ℃ of baking ovens in dry one-tenth parcel powder then.
3, hot pressed sintering
Fibrous nodules is put into the mould hot pressed sintering, and sintering process is: sintering temperature is that 1200～1700 ℃, sintering pressure are that 10～30MPa, sintering time are 30～60min, and sintering atmosphere is 0.1MPa nitrogen or vacuum.
Embodiment six: present embodiment selects 1300 ℃～1600 ℃/25MPa/30min hot-pressing sintering technique to prepare 30vol%C
Sf/ BAS matrix material.Material density improves along with the raising of temperature, and density is lower in the time of 1300 ℃, has only 92.55%, and when sintering temperature reached 1550 ℃, density reached 97.18%, and temperature further improves density and changes little.
Adopt 20vol%, 30vol%, the 40vol%C of the preparation of 1550 ℃/25MPa/60min hot-pressing sintering technique
Sf/ BAS matrix material.Along with the increase of fibre content, the density of matrix material has presented downward trend, 20vol%, 30vol%, 40vol%C
Sf/ BAS matrix material density is respectively 98.33%, 97.17% and 95.57%.
When temperature is low, be difficult to realize the densification of matrix material; Otherwise temperature is too high will to cause fiber degradation, also can impel to form strong the combination between fiber and the matrix, be unfavorable for fiber performance unsticking, extract Toughening Mechanism, therefore need to select suitable sintering temperature.
The peak that has only six side BAS on the XRD figure spectrum.SEM structure observation result shows that fiber dispersion is even, and in hot pressing planar directional profile, perpendicular to the rounded section that can only see fiber in the plane of hot pressing face.Mean fibre length is 140 μ m, 100 μ m and 70 μ m, and along with the increase of fiber volume fraction in the matrix material, mean fibre length reduces.30vol%C
SfThe TEM tissue of/BAS matrix material shows that BAS crystal grain is substantially all below 1 μ m.Interface between fiber and matrix is clean, reactionless layer.
C
SfAdding improved the mechanical property of matrix material effectively, bending strength is the trend that reduces after the first ascendant trend with the increase of carbon fiber content, at 30vol%C
SfIt is maximum that content reaches, and is 201MPa.Further increase C
SfContent is to 40vol%, and the bending strength of matrix material is reduced to 182Mpa, but still has improved 161% than matrix.Along with fibre content increases, the composite wood fracture toughness property also is the back reduction trend that rises earlier, 30vol%C
SfDuring content, fracture toughness property reaches maximum, is 3.39MPam
1/2When fibre content was increased to 40vol%, fracture toughness property dropped to 2.51MPam
1/2
Embodiment seven: present embodiment has prepared almost completely fine and close 30vol%, 40vol%C under 1550 ℃/25MPa/1h hot pressed sintering condition
Sf/ BSAS Reinforced Glass-Ceramic Composites.
The XRD material phase analysis shows 30vol%, 40vol%C
SfThe crystallisate of/BSAS matrix material is the monocline phase mutually, adds SAS and has promoted that effectively BAS changes mutually to monocline.
The SEM of matrix material organizes display fibers to be uniformly dispersed, and hot pressing planar directional profile, perpendicular to the rounded section that can only see fiber in the plane of hot pressing face.30vol%, 40vol%C
SfMean fibre length is respectively about 110 μ m and 80 μ m in/the BSAS matrix material.
The thermal expansivity measuring result of matrix material shows at its thermal expansivity below 200 ℃ and approaches zero that thermal expansivity has only 0.81 * 10 in 200-400 ℃ of scope
-6℃
-1, thermal expansivity reaches 1.63 * 10 after 400 ℃
-6℃
-1, in ℃ temperature range of room temperature～1000, on average have only 1.14 * 10
-6℃
-1
Add C
SfImproved the mechanical property of matrix material effectively.30vol%, 40vol%C
SfThe bending strength of/BSAS has reached 256MPa and 185MPa respectively, and fracture toughness property has reached 3.45MPam respectively
1/2And 2.67MPam
1/2, all be higher than C with component
Sf/ BAS matrix material.
Embodiment eight: the thermal expansivity of carbon fiber is much smaller than matrix, and matrices of composite material bears serious tensile stress and brings out crackle, and performance of composites reduces.Add Si
3N
4The BSAS matrix be can strengthen effectively and cracking, (C stoped
Sf+ Si
3N
4pDo not observe tiny crack in the)/BSAS matrices of composite material, so bending strength and fracture toughness property improve further.
(the 20vol%C that present embodiment prepares under the condition of 1500 ℃/20MPa/1h hot pressed sintering
Sf+ 35vol%Si
3N
4p)/45vol%BSAS matrix material, carbon fiber is evenly distributed, and major axis distributes along being parallel to hot pressing face direction.Fiber combines well with basal body interface.Si
3N
4Being uniformly dispersed, is the α-Si that waits the axle shape mostly
3N
4, contain a small amount of bar-shaped β-Si
3N
4The probability maximum that staple length occurs at 75～95 mu m ranges is less than the initial length that adds carbon fiber, 0.5～1.5mm.
Present embodiment is at (the 20vol%C of 1600 ℃/20MPa/1h hot pressed sintering preparation
Sf+ 35vol%Si
3N
4pIn the)/BSAS matrix material, the bar-shaped β-Si of a large amount of random orientations
3N
4Crystal grain and a small amount of axle shape α-Si that waits
3N
4Uniform crystal particles is distributed in the BSAS matrix.β-Si
3N
4Help improving matrix material bending strength and fracture toughness property.
Carbon fiber surface has the responding layer of thickness less than 1 μ m, and chemical damage may make fibre property degenerate, but being combined with by force of forming is beneficial to the load transmission, improves intensity.
(C
Sf+ Si
3N
4pThe bending strength of)/45vol%BSAS matrix material is with Si
3N
4Content increases in rising trend, works as Si
3N
4Content when 25vol.% is elevated to 35vol.%, the intensity of matrix material is brought up to 254.83MPa from 222.18MPa, but fracture toughness property is from 3.22MPam
1/2Be reduced to 3.08MPam
1/2
Intensity raises with sintering temperature and increases, and sintering temperature is brought up to 1600 ℃ from 1500 ℃, (20vol%Csf+35vol%Si3N4p)/intensity of BSAS is respectively 254.83MPa and 305.22MPa, and fracture toughness property raises and is 3.31MPam1/2.
Crack propagation path observations shows β-Si
3N
4Rod is brilliant to have the intensive inhibition for crack propagation.
Embodiment nine: present embodiment is at (the 20vol%C of 1500 ℃/20MPa/1h hot pressed sintering and the preparation of 1600 ℃/20MPa/1h hot pressed sintering
Sf+ 30vol%ZrO
2p)/BSAS matrix material thing is monocline BSAS (containing a small amount of six side BAS), ZrO mutually
2The t-m phase variable be 72.3% and 78.2%.C
Sf, ZrO
2pAnd between three group members of BSAS chemical reaction does not take place.Nanometer ZrO
2Glass-ceramic there is the forming core effect, can adjusts crystallization velocity, obtain uniform tissue more.The SEM of matrix material organizes display fibers along parallel hot pressing face stochastic distribution; Nanometer-ZrO
2Be agglomerated into the particle of about 0.5～2 μ m of particle diameter, in BSAS, be uniformly dispersed.
(20vol%, 30vol%, 40vol%C
Sf+ 20vol%ZrO
2pThe density of)/BSAS matrix material increases with carbon fiber content and reduces, and is respectively 98.8%, 97.3%, 96.6%; Along with ZrO
2Content increases, and the density of matrix material raises, (20vol%C
Sf+ 10,20vol%ZrO
2pThe density of)/BSAS matrix material brings up to 98.2% from 97.5%; Along with sintering temperature raises, the density of matrix material slightly raises.
(the C of 1500 ℃/20MPa/1h hot pressed sintering preparation
Sf+ ZrO
2pThe bending strength of)/BSAS matrix material is with ZrO
2The content increase rises to 209.2MPa from 159.2MPa.Intensity raises with sintering temperature and improves, (the 20vol%C of 1500 ℃/20MPa/1h hot pressed sintering and the preparation of 1600 ℃/20MPa/1h hot pressed sintering
Sf+ 20vol%ZrO
2pThe bending strength of)/BSAS matrix material is respectively 209.2MPa and 219.1MPa.
Along with carbon fiber content raises, the intensity of matrix material is on a declining curve, (30vol%, 40vol%C
Sf+ 20vol%ZrO
2pThe intensity of)/BSAS carbon-fibre composite is respectively 205.7MPa, and 192.8MPa is due to density descends.
Nanometer ZrO
2pCollaborative carbon fiber has obviously improved fracture toughness property.Along with nanometer ZrO
2Content increases, and the fracture toughness property of (20vol%Csf+10,20vol%ZrO2p)/BSAS matrix material is from 3.63MPam
1/2Bring up to 4.02MPam
1/2Along with sintering temperature is brought up to 1600 ℃, (20vol%C from 1500 ℃
Sf+ 20vol%ZrO
2pThe fracture toughness property of)/BSAS matrix material is from 4.02MPam
1/2Be reduced to 3.76MPam
1/2
Along with carbon fiber content raises, fracture toughness property is the trend of falling after rising, 30vol.% and 40vol.%C
SfThe fracture toughness property of matrix material is respectively 3.80MPam
1/2And 2.94MPam
1/2
The embodiment ten: (10vol%ZrO that present embodiment prepares under 1500 ℃/20MPa/1h hot pressed sintering condition
2+ 25vol%Si
3N
4+ 20vol%C
SfThe XRD thing phase composite of)/BSAS matrix material is α-Si
3N
4, monocline BSAS, m-ZrO
2, t-ZrO
2The density 98.1% of matrix material is organized similarly to other matrix material, and bending strength is 259.08MPa, and fracture toughness property is 4.51MPam
1/2
Si
3N
4Strengthen matrix, nanometer ZrO
2Adjust internal stress and can both improve matrix material flexural strength and fracture toughness property.Utilize C
Sf, nanometer ZrO
2With Si
3N
4Three synergy further improves the mechanical property of BSAS based composites.
Claims (10)
1, short carbon fiber strengthens BaAl
2Si
2O
8Matrix material is characterized in that described BaAl
2Si
2O
8Matrix material comprises that carbon chopped fiber strengthens body and BaAl
2Si
2O
8, wherein the volume percent of carbon chopped fiber enhancing body is 1%～50%.
2, short carbon fiber according to claim 1 strengthens BaAl
2Si
2O
8Matrix material is characterized in that described BaAl
2Si
2O
8Matrix material also comprises Si
3N
4Particle, Si
3N
4The particulate volume percent is 1%～50%.
3, short carbon fiber according to claim 1 and 2 strengthens BaAl
2Si
2O
8Matrix material is characterized in that described BaAl
2Si
2O
8Matrix material also comprises the nano zircite particle, and nano zircite particulate volume percent is 1%～50%.
4, short carbon fiber according to claim 1 strengthens BaAl
2Si
2O
8Matrix material is characterized in that the volume percent of described carbon chopped fiber enhancing body is 10%～30%.
5, short carbon fiber according to claim 2 strengthens BaAl
2Si
2O
8Matrix material is characterized in that described Si
3N
4The particulate volume percent is 10%～30%.
6, short carbon fiber according to claim 3 strengthens BaAl
2Si
2O
8Matrix material is characterized in that described nano zircite particulate volume percent is 10%～30%.
7, short carbon fiber strengthens BaAl
2Si
2O
8The preparation method of matrix material is characterized in that described method comprises the steps:
A, the carbon fiber weak point being cut to 1～3mm, is medium ultra-sonic dispersion 20～40min with the dehydrated alcohol, treats that carbon fiber is reunited to pull fibre plate in flakes out, prescinds the elimination disintegrating slag for the second time according to 1～3mm progress row;
B, take by weighing BaAl
2Si
2O
8Powder stock in the Plastic Bottle of packing into, adds the dehydrated alcohol or the Virahol of 2～50 times of volumes, wet mixing, pulping;
C, add the carbon fiber that prescinds according to the described proportioning of claim 1 in slurry, ultrasonic concussion 10～30min puts into the fibrous nodules that oven drying becomes the parcel powder then;
D, fibrous nodules is put into mould for hot pressed sintering, the control sintering temperature is that 1200～1700 ℃, sintering pressure are that 10～30MPa, sintering time are 30～60min, and sintering atmosphere is 0.1MPa nitrogen or vacuum.
8, short carbon fiber according to claim 7 strengthens BaAl
2Si
2O
8The preparation method of matrix material, the diameter that it is characterized in that described fibrous nodules is 1～2mm.
9, short carbon fiber according to claim 7 strengthens BaAl
2Si
2O
8The preparation method of matrix material is characterized in that in the described slurry also adding that Si is arranged
3N
4Particle, Si
3N
4The particulate volume percent is 1%～50%.
10, strengthen BaAl according to claim 7 or 8 described short carbon fibers
2Si
2O
8The preparation method of matrix material is characterized in that in the described slurry also adding that the nano zircite particle is arranged, and nano zircite particulate volume percent is 1%～50%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101508592B (en) * | 2009-03-20 | 2011-07-27 | 哈尔滨工业大学 | Process for producing stephanoporate Si3N4 |
| CN102584308A (en) * | 2012-02-03 | 2012-07-18 | 西北工业大学 | Preparation method of carbon fiber/zirconia nano-wire hybrid reinforced material |
| CN102584308B (en) * | 2012-02-03 | 2013-04-24 | 西北工业大学 | Preparation method of carbon fiber/zirconia nano-wire hybrid reinforced material |
| CN106630639A (en) * | 2016-12-21 | 2017-05-10 | 江苏省冶金设计院有限公司 | Carbon fiber baryta feldspar glass ceramics multiphase material and preparation method thereof |
| CN108275989A (en) * | 2017-12-27 | 2018-07-13 | 佛山科学技术学院 | A kind of preparation method and application method of nano modification BSAS ceramic coatings |
| CN108203794A (en) * | 2018-01-04 | 2018-06-26 | 中南大学 | A kind of short carbon fiber aluminum matrix composite and preparation method thereof |
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