CN104926346B - A kind of alumina fibre fabric containing interface phase strengthens silicon carbide ceramics and preparation method thereof - Google Patents
A kind of alumina fibre fabric containing interface phase strengthens silicon carbide ceramics and preparation method thereof Download PDFInfo
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Abstract
A kind of alumina fibre fabric containing interface phase strengthens silicon carbide ceramics, and which is using alumina fibre fabric as reinforcement, using silicon carbide ceramics as matrix, and is formed with sacrifice carbon interface phase between reinforcement and matrix；Its processing step for preparing includes：First alumina fibre fabric is placed in Muffle furnace carries out high-temperature oxydation, deposits Pyrolytic carbon coating using chemical vapor deposition method in fabric surface；Precursor solution is prepared, and with its vacuum impregnation fabric, densified and repetitious densified, the alumina fibre fabric enhancing silicon carbide ceramics of the prepared interface of the carbon containing cracking phase is completed once after crosslinked at low temperature and refractory ceramics；Finally by high-temperature heat treatment sacrifice cracking carbon interface phase, final products are obtained.The mechanical property of product of the present invention, antioxygenic property and high-temperature behavior are excellent, and short preparation period, low cost, can be with near-net-shape.
Description
Technical field
A kind of the present invention relates to fiber reinforcedceramics field, more particularly to alumina fibre fabric enhancing carborundum pottery
Porcelain and preparation method thereof.
Background technology
Continuous Fiber Reinforced Ceramic Matrix Composites (CFCC) have high specific strength, high ratio modulus, high tenacity, anti-yaw damper,
The advantages of resistance to oxidation, it is novel fire resistant, the main flow of low density heat structural material development, has in aerospace field wide
Application prospect.According to the difference of matrix variety, CFCC can be divided into glass base, oxide-base and non-oxidized substance based composites three
Class.At present, studying material system more and that application is wider mainly has carbon, carborundum and oxide ceramics based composites, adopts
Reinforcing fiber mainly has carbon fiber, three class of silicon carbide fibre and oxide fibre.Wherein, carbon fibre reinforced ceramics base is combined
Material has excellent combination property, but its antioxygenic property is poor；It is same that silicon carbide fibre strengthens ceramic matric composite
There is excellent combination property, but which is practical temperature limited in silicon carbide fibre and high-performance silicon carbide fiber is (such as Hi-
Nicalon etc.) expensive, it is difficult to large-scale promotion application；Oxide fibre enhancing ceramic matric composite has excellent
Antioxygenic property and higher using temperature, become the focus of new thermal structure material research.Additionally, oxide ceramics base is multiple
Chemically and thermally physical compatibility is poor for condensation material median surface, and fiber is easily damaged and causes mechanical property not high；And silicon carbide ceramics
Based composites have excellent high temperature resistant, anti-oxidant and creep-resistant property, while also can apply to high temperature absorbing material field.
Thus, oxide fibre strengthens the extensive concern that carbon/silicon carbide ceramic matrix composite causes researcher.
Oxide fibre strengthens the preparation technology of carbon/silicon carbide ceramic matrix composite mainly to be had：Precursor infiltration and pyrolysis method
(PIP), chemical vapor infiltration (CVI), liquid-phase silicone method of impregnation (LSI) and mud dipping pressure sintering (SI-HP) etc..Wherein, PIP
The application of technique and CVI techniques is relatively broad.Carborundum good crystallinity prepared by CVI techniques, purity are higher, but the technique is fine and close
Change speed is low, the cycle is long, requires higher, the special equipment of needs to technical process control, and matrix composition designability is poor；And
PIP technique preparation temperatures are relatively low, without the need for pressurization, the thermomechanical damage to fiber is less, operating process is simple, to equipment requirement not
Height, and matrix the Nomenclature Composition and Structure of Complexes designability is strong, the technique main disadvantage is that fiber and matrix are susceptible to interfacial reaction
Form strong-binding interface, it usually needs carry out interface modification.
Currently, there is no the research report that oxide fibre strengthens carbon/silicon carbide ceramic matrix composite is prepared with regard to PIP techniques,
Only the research report that oxide fibre strengthens carbon/silicon carbide ceramic matrix composite is prepared with regard to CVI techniques on a small quantity, as a result show：
The material system has excellent mechanical property and antioxygenic property, but CVI techniques manufacturing cycle is typically for up to hundreds of hours, raw
Produce less efficient.
Content of the invention
The technical problem to be solved is to overcome the shortcomings of to mention and defect in background above technology, there is provided one
Plant the excellent alumina fibre fabric containing interface phase of mechanical property, antioxygenic property and high-temperature behavior and strengthen carborundum (letter
It is written as Al2O3f/ SiC) pottery, and accordingly provide a kind of short preparation period, low cost, can be with the system of the near-net-shape pottery
Preparation Method.
For solving above-mentioned technical problem, technical scheme proposed by the present invention is a kind of alumina fibre fabric containing interface phase
Strengthen silicon carbide ceramics, the pottery be using alumina fibre fabric as reinforcement, using silicon carbide ceramics as matrix, and increase
Strong being formed between body and matrix sacrifices carbon interface phase.More feature, the sacrifice carbon interface of the present invention is mutually through precursor
The alumina fibre fabric that the phase of the carbon interface containing cracking is first obtained after impregnating cracking technology strengthens silicon carbide ceramics, then through high warm at
Reason is obtained after sacrificing cracking carbon interface phase.
The above-mentioned alumina fibre fabric containing interface phase strengthens silicon carbide ceramics, preferably：The bending of the pottery is strong
Degree is in more than 150MPa, and is less than 5% through the bending strength amplitude of variation after 1000 DEG C of high-temperature oxydation 2h；The bullet of the pottery
Property modulus in more than 75GPa, and through the elastic modulus change amplitude after 1000 DEG C of high-temperature oxydation 2h be less than 5%.
Used as a total technology design, the present invention also provides a kind of above-mentioned alumina fibre fabric containing interface phase and strengthens
The preparation method of silicon carbide ceramics, comprises the following steps that：
(1) fabric pretreatment：Alumina fibre fabric is placed in Muffle furnace carries out high-temperature oxydation, to remove surface
Glue and impurity；
(2) prepared by fabric surface Pyrolytic carbon coating：Obtained in step (1) using chemical vapor deposition (CVD) technique
Alumina fibre fabric face deposition Pyrolytic carbon coating；
(3) precursor solution is prepared：Polycarbosilane and dimethylbenzene are weighed by proportioning, standby after mixing and stirring；
(4) matrix densification：With the aluminum oxide obtained after the precursor solution vacuum impregnation step (2) that step (3) is obtained
Fabric, then takes out and dries, and completes a densification process after crosslinked at low temperature and refractory ceramics；
(5) repeatedly densified：Repeat the above steps (4) at least 10 times (preferably 10～15 times), are obtained the interface of the carbon containing cracking
The alumina fibre fabric of phase strengthens silicon carbide ceramics；
(6) oxidation processes：The alumina fibre fabric of the interface of the carbon containing the cracking phase that above-mentioned steps (5) are obtained strengthens carbonization
Silicon pottery is placed in Muffle furnace, by high-temperature oxydation to sacrifice cracking carbon interface phase, is made pottery in alumina fibre fabric and carborundum
Gap is formed between porcelain basal body, the alumina fibre fabric containing interface phase is obtained and strengthens silicon carbide ceramics.
Above-mentioned preparation method, it is preferred that in step (1), the alumina fibre fabric are 2.5D structures, three-dimensional
Four-way structure, three-dimensional five are to structure, three-dimensional six to structure or three-dimensional orthogonal structure；Fiber volume in the alumina fibre fabric
Fraction is 35%～50%.Existing most of techniques are more can only to be suitable for one-dimensional, two-dimentional fabric, and using invention
Preparation method can be better achieved three-dimensional aluminum oxide fabric strengthen silicon carbide ceramics near-net-shape.
Above-mentioned preparation method, it is preferred that in step (1), the technical process of the high-temperature oxydation is：By aluminum oxide
Fabric is put in Muffle furnace, rises to 600 DEG C～800 DEG C with the heating rate of 5 DEG C/min～10 DEG C/min in atmosphere,
Insulation 1h～3h, naturally cools to less than 100 DEG C and takes out.
Above-mentioned preparation method, it is preferred that in step (2), the Parameter Conditions of institute's chemical vapor deposition method include：
Unstripped gas is propylene and argon gas, and depositing temperature is 900 DEG C～1100 DEG C, and deposition pressure is 1kPa～3kPa, propylene and argon gas stream
Than being 1: 1～1: 3, sedimentation time is 1h～5h to speed.
Above-mentioned preparation method, it is preferred that in step (3), the mass ratio of the Polycarbosilane and dimethylbenzene is 1:
0.8～1: 1.2.
Above-mentioned preparation method, it is preferred that in step (4), the vacuum impregnation time be 4h～8h, flash-off time
For 2h～5h.
Above-mentioned preparation method, it is preferred that in step (4), the crosslinked at low temperature is complete using oven drying mode
Into its technical process is：Alumina fibre fabric after drying is put in convection oven, in atmosphere with 2 DEG C/min～5
DEG C/heating rate of min rises to 160 DEG C～200 DEG C, 3h～6h is incubated, room temperature is naturally cooled to.
Above-mentioned preparation method, it is preferred that in step (4), the refractory ceramics is the side using Pintsch process
Formula is completed, and its technical process is：Alumina fibre fabric after by crosslinked at low temperature is put in pyrolysis furnace, in argon gas with 10 DEG C/
The heating rate of min～15 DEG C/min rises to 900 DEG C～1100 DEG C, is incubated 0.5h～2h, naturally cools to less than 100 DEG C and take
Go out.
Above-mentioned preparation method, it is preferred that in step (6), the high-temperature heat treatment is referred to：In atmosphere with 5 DEG C/
The heating rate of min～10 DEG C/min rises to 600 DEG C～800 DEG C, is incubated 1h～2h, naturally cools to less than 100 DEG C and take out.
The above-mentioned technical proposal of the present invention has prepared high performance oxygen by reasonably interface using PIP techniques
Change aluminum fiber fabric and strengthen carbon/silicon carbide ceramic matrix composite, this for the expansion of high temperature heat structure functional material, with very
Important meaning.
Compared with prior art, it is an advantage of the current invention that：
1. the Al containing interface phase of the present invention2O3fThe preparation method of/SiC ceramic combines liquid phase method, Ke Yi for vapor phase method
At relatively low temperature, pressureless sintering prepares SiC ceramic matrix, and manufacturing cycle is shorter；
2. tied in alumina fibre fabric face pre-deposition Pyrolytic carbon coating using CVD techniques in the preparation method of the present invention
Brilliant degree is high, thickness evenness is good, can effectively suppress the diffusion of alumina fibre and matrix in composite preparation process anti-
Should, so as to weaken interface cohesion；And uniform gap can be left between alumina fibre and matrix after aoxidizing sacrifice, effectively
Improve the Al containing interface phase2O3fThe thermal structure stability of/SiC ceramic；
3. appropriate design of the preparation method of the present invention by fibrage mode, can be with the complicated structure of preparation structure
Part, and product design size can be controlled by Digit Control Machine Tool precision machining.
All in all, the obtained Al containing interface phase of the present invention2O3f/ SiC ceramic, with general ceramic matric composite
Common advantage, such as low-density and excellent mechanical property etc..Additionally, and Cf/ SiC and SiCf/ SiC ceramic is compared, and the present invention contains
The Al of interface phase2O3f/ SiC ceramic has more excellent antioxygenic property；The Al prepared with CVI techniques2O3f/ SiC ceramic phase
Than the Al containing interface phase of the present invention2O3fThe high-temperature process time of/SiC ceramic is shorter, and the fire damage to fiber is less, need not
Special equipment, production efficiency is higher and cost is lower.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is obtained Al in the embodiment of the present invention 12O3fExemplary bent intensity-the displacement curve of/SiC ceramic.
Fig. 2 is the section microscopic appearance figure of obtained control sample in the embodiment of the present invention 1.
Fig. 3 is obtained Al in the embodiment of the present invention 12O3fThe section microscopic appearance figure of/SiC ceramic.
Specific embodiment
For the ease of understanding the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face, meticulously describe, but protection scope of the present invention is not limited to embodiment in detail below.
Unless otherwise defined, the implication that all technical terms used hereinafter are generally understood that with those skilled in the art
Identical.Technical term used herein is intended merely to the purpose for describing specific embodiment, is not intended to limit the present invention
Protection domain.
Unless otherwise specified, the various raw material used in the present invention, reagent, instrument and equipment etc. can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1：
A kind of alumina fibre fabric containing interface phase of the present invention strengthens silicon carbide ceramics, and which is knitted with alumina fibre
Thing and is formed with sacrifice carbon interface phase as reinforcement using silicon carbide ceramics as matrix between reinforcement and matrix.
Alumina fibre fabric of the present embodiment containing interface phase strengthens the preparation method of silicon carbide ceramics, specifically includes following
Processing step：
(1) fabric pretreatment：The three-dimensional orthogonal alumina fibre fabric that fiber volume fraction is 40% is placed in horse
Not in stove, 600 DEG C are risen to the heating rate of 10 DEG C/min in atmosphere, be incubated 2h, naturally cool to less than 100 DEG C and take out,
To remove surface glue and impurity；
(2) prepared by fabric surface Pyrolytic carbon coating：Obtained in step (1) using chemical vapor deposition method (CVD)
Fabric surface deposition Pyrolytic carbon coating, CVD technological parameters include：Unstripped gas is propylene and argon gas, and depositing temperature is 960
DEG C, deposition pressure is 1kPa, and propylene and argon gas velocity ratio are 1: 1, and sedimentation time is 5h；
(3) precursor solution is prepared：In mass ratio 1: 1 weighs Polycarbosilane and dimethylbenzene, standby after mixing and stirring；
(4) matrix densification：The aluminum oxide that the precursor solution vacuum impregnation step (2) obtained with step (3) is obtained is fine
Dimensional fabric, takes out after vacuum impregnation 6h and hangs 3h；Alumina fibre fabric after drying is put in convection oven carries out low temperature
Crosslinking, rises to 180 DEG C with the heating rate of 3 DEG C/min in atmosphere, is incubated 4h, naturally cools to room temperature；After by crosslinked at low temperature
Alumina fibre fabric be put in pyrolysis furnace, rise to 1000 DEG C with the heating rate of 10 DEG C/min in argon gas, be incubated 1h, from
So it is cooled to less than 100 DEG C to take out；Complete a densification process；
(5) repeatedly densified：Repeat the above steps (4) 13 times, are obtained the alumina fibre fabric of the interface of the carbon containing cracking phase
Strengthen silicon carbide ceramics；
(6) high-temperature heat treatment：The alumina fibre fabric of the interface of the carbon containing the cracking phase that above-mentioned steps (5) are obtained strengthens carbon
SiClx pottery is placed in Muffle furnace, rises to 600 DEG C with the heating rate of 8 DEG C/min in atmosphere, is incubated 2h, is naturally cooled to
Less than 100 DEG C are taken out, and are obtained and are strengthened silicon carbide ceramics containing the alumina fibre fabric for sacrificing carbon interface phase.
Method according to the present embodiment is prepared without the Al for sacrificing carbon interface phase2O3f/ SiC ceramic as control sample (i.e. without
Pyrolytic carbon coating need to be prepared on alumina fibre fabric, carbon interface is cracked without follow-up high-temperature heat treatment is carried out to sacrifice
Phase), to the Al obtained in above-mentioned the present embodiment containing interface phase2O3f/ SiC ceramic and aforementioned control sample carry out mechanical property contrast and survey
Examination, typical load-displacement curves are as shown in Figure 1.As seen from Figure 1, control sample shows brittle fracture behavior, and the present embodiment
The Al containing interface phase2O3f/ SiC ceramic shows obvious ductile rupture behavior, is gradually lowered after load reaches maximum, this
The Al containing interface phase of embodiment2O3fThe bending strength of/SiC ceramic is about 4 times of control sample.
In addition, the section microscopic appearance of control sample manufactured in the present embodiment is as shown in Fig. 2 from Figure 2 it can be seen that section is more put down
Whole, do not observe interfacial detachment and spike protein gene phenomenon, show that fiber/matrix interface cohesion is stronger in control sample, the increasing of fiber
Potent fruit is not notable.And the Al containing interface phase manufactured in the present embodiment2O3fThe section microscopic appearance of/SiC ceramic as shown in figure 3,
By Fig. 3 it is observed that obvious interfacial detachment and spike protein gene phenomenon, this shows that the introducing for sacrificing carbon interface phase can be weakened
Fiber/matrix interface cohesion, the enhancing effect of fiber are more notable, and this is also the Al containing interface phase prepared by the present invention2O3f/
The essential reason of SiC ceramic excellent in mechanical performance.
Al containing interface phase obtained above2O3fThe Specifeca tion speeification of/SiC ceramic is as shown in table 1.
Table 1：The Al prepared in embodiment 12O3fThe Specifeca tion speeification of/SiC ceramic
Embodiment 2：
A kind of alumina fibre fabric containing interface phase of the present invention strengthens silicon carbide ceramics, and which is knitted with alumina fibre
Thing and is formed with sacrifice carbon interface phase as reinforcement using silicon carbide ceramics as matrix between reinforcement and matrix.
Alumina fibre fabric of the present embodiment containing interface phase strengthens the preparation method of silicon carbide ceramics, specifically includes following
Processing step：
(1) fabric pretreatment：The three-dimensional four-way alumina fibre fabric that fiber volume fraction is 45% is placed in horse
Not in stove, 700 DEG C are risen to the heating rate of 8 DEG C/min in atmosphere, be incubated 1h, naturally cool to less than 100 DEG C and take out, with
Remove surface glue and impurity；
(2) prepared by fabric surface Pyrolytic carbon coating：Obtained in step (1) using chemical vapor deposition method (CVD)
Fabric surface deposition Pyrolytic carbon coating, CVD technological parameters include：Unstripped gas is that propylene and argon gas, depositing temperature are
1050 DEG C, deposition pressure is 2kPa, and propylene and argon gas velocity ratio are 1: 2, and sedimentation time is 2h；
(3) precursor solution is prepared：In mass ratio 1: 0.8 weighs Polycarbosilane and dimethylbenzene, mixing and stirring standby
With；
(4) matrix densification：The aluminum oxide that the precursor solution vacuum impregnation step (2) obtained with step (3) is obtained is fine
Dimensional fabric, takes out after vacuum impregnation 4h and hangs 4h；Alumina fibre fabric after drying is put in convection oven carries out low temperature
Crosslinking, rises to 160 DEG C with the heating rate of 5 DEG C/min in atmosphere, is incubated 6h, naturally cools to room temperature；After by crosslinked at low temperature
Alumina fibre fabric be put in pyrolysis furnace, rise to 1050 DEG C with the heating rate of 15 DEG C/min in argon gas, be incubated 0.5h,
Naturally cool to less than 100 DEG C to take out；Complete a densification process；
(5) repeatedly densified：Repeat the above steps (4) 10 times, are obtained the alumina fibre fabric of the interface of the carbon containing cracking phase
Strengthen silicon carbide ceramics；
(6) high-temperature heat treatment：The alumina fibre fabric of the interface of the carbon containing the cracking phase that above-mentioned steps (5) are obtained strengthens carbon
SiClx pottery is placed in Muffle furnace, rises to 700 DEG C with the heating rate of 10 DEG C/min in atmosphere, is incubated 1h, is naturally cooled to
Less than 100 DEG C are taken out, and are obtained and are strengthened silicon carbide ceramics containing the alumina fibre fabric for sacrificing carbon interface phase.
Method according to the present embodiment is prepared without the Al for sacrificing carbon interface phase2O3f/ SiC ceramic as control sample (i.e. without
Pyrolytic carbon coating need to be prepared on alumina fibre fabric, carbon interface is cracked without follow-up high-temperature heat treatment is carried out to sacrifice
Phase), to the Al obtained in above-mentioned the present embodiment containing interface phase2O3f/ SiC ceramic and aforementioned control sample carry out mechanical property contrast and survey
Examination, the Al containing interface phase for obtaining2O3fThe Specifeca tion speeification of/SiC ceramic is as shown in table 2.
Table 2：The Al prepared in embodiment 22O3fThe Specifeca tion speeification of/SiC ceramic
In addition, the section microscopic appearance of above-mentioned control sample shows that section is more smooth, interfacial detachment and fiber is not observed
Phenomenon is extracted, shows that fiber/matrix interface cohesion is stronger in control sample, the enhancing effect of fiber is not notable.And the present embodiment system
The standby Al containing interface phase2O3fIt is observed that obvious interfacial detachment and spike protein gene in the section microscopic appearance of/SiC ceramic
Phenomenon, this show that the introducing for sacrificing carbon interface phase can weaken fiber/matrix interface cohesion, and the enhancing effect of fiber more shows
Write, this is also the Al containing interface phase prepared by the present invention2O3fThe essential reason of/SiC ceramic excellent in mechanical performance.
Therefore, the bending strength of the alumina fibre fabric enhancing silicon carbide ceramics containing interface phase of the present invention exists
More than 150MPa, and 5% is less than through the bending strength amplitude of variation after 1000 DEG C of high-temperature oxydation 2h；The elastic modelling quantity of pottery exists
More than 75GPa, and 5% is less than through the elastic modulus change amplitude after 1000 DEG C of high-temperature oxydation 2h.
Claims (3)
1. a kind of alumina fibre fabric containing interface phase strengthens the preparation method of silicon carbide ceramics, the alumina fibre fabric
It is and reinforcement and base using alumina fibre fabric as reinforcement, using silicon carbide ceramics as matrix to strengthen silicon carbide ceramics
Sacrifice carbon interface phase is formed between body, it is characterised in that the preparation method specifically includes following processing step：
(1) fabric pretreatment：Alumina fibre fabric is placed in Muffle furnace carries out high-temperature oxydation, with remove surface glue and
Impurity；The alumina fibre fabric is 2.5D structures, three-dimensional four-way structure, three-dimensional five are to structure, three-dimensional six to structure or three
Orthogonal dimension structure；In the alumina fibre fabric, fiber volume fraction is 35%～50%；The technique mistake of the high-temperature oxydation
Cheng Wei：Alumina fibre fabric is put in Muffle furnace, is risen to the heating rate of 5 DEG C/min～10 DEG C/min in atmosphere
600 DEG C～800 DEG C, 1h～3h is incubated, less than 100 DEG C is naturally cooled to and is taken out；
(2) prepared by fabric surface Pyrolytic carbon coating：Fine in the aluminum oxide that step (1) is obtained using chemical vapor deposition method
Dimensional fabric surface deposits Pyrolytic carbon coating；The Parameter Conditions of institute's chemical vapor deposition method include：Unstripped gas is propylene and argon gas,
Depositing temperature is 900 DEG C～1100 DEG C, and deposition pressure is 1kPa～3kPa, and propylene and argon gas velocity ratio are 1: 1～1: 3, deposition
Time is 1h～5h；
(3) precursor solution is prepared：The mass ratio for weighing Polycarbosilane and dimethylbenzene, the Polycarbosilane and dimethylbenzene is 1:
0.8～1: 1.2, standby after mixing and stirring；
(4) matrix densification：With the alumina fibre obtained after the precursor solution vacuum impregnation step (2) that step (3) is obtained
Fabric, then takes out and dries, and completes a densification process after crosslinked at low temperature and refractory ceramics；The vacuum impregnation time
For 4h～8h, flash-off time is 2h～5h；The crosslinked at low temperature is completed using oven drying mode, and its technical process is：Will
Alumina fibre fabric after drying is put in convection oven, is risen to the heating rate of 2 DEG C/min～5 DEG C/min in atmosphere
160 DEG C～200 DEG C, 3h～6h is incubated, room temperature is naturally cooled to；
(5) repeatedly densified：Repeat the above steps (4) at least 10 times, are obtained the alumina fibre fabric of the interface of the carbon containing cracking phase
Strengthen silicon carbide ceramics；
(6) high-temperature heat treatment：The alumina fibre fabric of the interface of the carbon containing the cracking phase that above-mentioned steps (5) are obtained strengthens carborundum
Pottery is placed in Muffle furnace, by high-temperature heat treatment to sacrifice cracking carbon interface phase, is made pottery in alumina fibre fabric and carborundum
Gap is formed between porcelain basal body, the alumina fibre fabric containing interface phase is obtained and strengthens silicon carbide ceramics；
The alumina fibre fabric strengthens the bending strength of silicon carbide ceramics in more than 150MPa, and through 1000 DEG C of high-temperature oxydations
Bending strength amplitude of variation after 2h is less than 5%；The elastic modelling quantity of the pottery in more than 75GPa, and through 1000 DEG C of high temperature
Elastic modulus change amplitude after oxidation 2h is less than 5%.
2. preparation method according to claim 1, it is characterised in that in step (4)：The refractory ceramics is to adopt
Completed with the mode of Pintsch process, its technical process is：Alumina fibre fabric after by crosslinked at low temperature is put in pyrolysis furnace,
900 DEG C～1100 DEG C are risen to the heating rate of 10 DEG C/min～15 DEG C/min in argon gas, 0.5h～2h is incubated, is naturally cooled to
Less than 100 DEG C are taken out.
3. preparation method according to claim 1, it is characterised in that in step (6), the high-temperature heat treatment is
Refer to：600 DEG C～800 DEG C are risen to the heating rate of 5 DEG C/min～10 DEG C/min in atmosphere, 1h～2h, natural cooling is incubated
Take out to less than 100 DEG C.
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| CN106966743B (en) * | 2016-06-03 | 2018-05-01 | 北京航空航天大学 | A kind of preparation method of continuous lod thermal structure material compound interface layer |
| CN106966703B (en) * | 2016-06-03 | 2020-07-28 | 北京航空航天大学 | Alumina fiber reinforced alumina ceramic containing interface phase and preparation method thereof |
| CN108484135A (en) * | 2018-04-17 | 2018-09-04 | 苏州宏久航空防热材料科技有限公司 | A kind of growth in situ ceramics reinforcing fiber resin composite materials |
| CN110282993B (en) * | 2019-08-06 | 2021-05-28 | 山东道普安制动材料有限公司 | Preparation method of ceramic matrix composite containing interface phase |
| CN110983757B (en) * | 2019-12-04 | 2022-04-29 | 航天特种材料及工艺技术研究所 | Method for modifying fiber interface of alumina fiber cloth and modified alumina fiber cloth prepared by method |
| CN114853490B (en) * | 2022-03-20 | 2023-10-24 | 西北工业大学 | SiC/SiC ceramic composite material with excellent formability and good mechanical properties and preparation method thereof |
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