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Preparation method of stealth structure type oxide fiber reinforced silicon-based ceramic composite material
The invention provides a preparation method of a stealth structure type oxide fiber reinforced silicon-based ceramic composite material. The method comprises the following steps: laminating plain woven alumina fiber cloth to form an alumina fiber preform; preparing a BN and PyC composite interface in the prepared alumina fiber preform through a chemical vapor infiltration process; preparing a SiOC matrix from the obtained material containing the BN and PyC composite interface through a polymer impregnation cracking process, so as to prepare a porous Al2O3f/SiOC composite material; the obtained porous Al2O3f/SiOC composite material is oxidized for 10 h to 40 h in the air environment with the temperature ranging from 500 DEG C to 600 DEG C; and filling pores of the Al2O3f/SiOC composite material obtained by oxidation through a chemical vapor infiltration process to obtain the Al2O3f/SiOC-Si3N4 composite material. According to the preparation method, a low-dielectric low-loss BN interface and a high-conductivity PyC interface are introduced into the composite material, the BN-C interface is successfully prepared by regulating and controlling the interface thickness, the interface state and the interface components, then the mechanical/wave-absorbing performance of Al2O3f-CMC is synergistically optimized, and the stealth structure type ceramic matrix composite material is obtained.
本发明提供一种隐身结构型氧化物纤维增强硅基陶瓷复合材料的制备方法，该方法包括：将平纹编织的氧化铝纤维布进行叠层形成氧化铝纤维预制体；在所制的氧化铝纤维预制体中通过化学气相渗透工艺制备BN和PyC复合界面；将所得包含BN和PyC复合界面的材料通过聚合物浸渍裂解工艺制备SiOC基体，制得多孔Al2O3f/SiOC复合材料；将所得多孔Al2O3f/SiOC复合材料在500‑600℃空气环境下氧化10‑40h；将通过化学气相渗透工艺填充氧化所得Al2O3f/SiOC复合材料的孔隙得到Al2O3f/SiOC‑Si3N4复合材料。本发明将低介低损的BN界面和高导电的PyC界面引入复合材料中，通过调控界面厚度、界面状态和界面组分，成功制备BN‑C界面，进而协同优化Al2O3f‑CMC的力学/吸波性能，获得隐身结构型陶瓷基复合材料。
Preparation method of stealth structure type oxide fiber reinforced silicon-based ceramic composite material
The invention provides a preparation method of a stealth structure type oxide fiber reinforced silicon-based ceramic composite material. The method comprises the following steps: laminating plain woven alumina fiber cloth to form an alumina fiber preform; preparing a BN and PyC composite interface in the prepared alumina fiber preform through a chemical vapor infiltration process; preparing a SiOC matrix from the obtained material containing the BN and PyC composite interface through a polymer impregnation cracking process, so as to prepare a porous Al2O3f/SiOC composite material; the obtained porous Al2O3f/SiOC composite material is oxidized for 10 h to 40 h in the air environment with the temperature ranging from 500 DEG C to 600 DEG C; and filling pores of the Al2O3f/SiOC composite material obtained by oxidation through a chemical vapor infiltration process to obtain the Al2O3f/SiOC-Si3N4 composite material. According to the preparation method, a low-dielectric low-loss BN interface and a high-conductivity PyC interface are introduced into the composite material, the BN-C interface is successfully prepared by regulating and controlling the interface thickness, the interface state and the interface components, then the mechanical/wave-absorbing performance of Al2O3f-CMC is synergistically optimized, and the stealth structure type ceramic matrix composite material is obtained.
本发明提供一种隐身结构型氧化物纤维增强硅基陶瓷复合材料的制备方法，该方法包括：将平纹编织的氧化铝纤维布进行叠层形成氧化铝纤维预制体；在所制的氧化铝纤维预制体中通过化学气相渗透工艺制备BN和PyC复合界面；将所得包含BN和PyC复合界面的材料通过聚合物浸渍裂解工艺制备SiOC基体，制得多孔Al2O3f/SiOC复合材料；将所得多孔Al2O3f/SiOC复合材料在500‑600℃空气环境下氧化10‑40h；将通过化学气相渗透工艺填充氧化所得Al2O3f/SiOC复合材料的孔隙得到Al2O3f/SiOC‑Si3N4复合材料。本发明将低介低损的BN界面和高导电的PyC界面引入复合材料中，通过调控界面厚度、界面状态和界面组分，成功制备BN‑C界面，进而协同优化Al2O3f‑CMC的力学/吸波性能，获得隐身结构型陶瓷基复合材料。
Preparation method of stealth structure type oxide fiber reinforced silicon-based ceramic composite material
隐身结构型氧化物纤维增强硅基陶瓷复合材料的制备方法
XUE JIMEI (author) / GAO YUAN (author) / LIU YUQIANG (author) / YANG FAN (author) / WANG YUQIU (author) / FAN XIAOMENG (author)
2024-05-24
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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