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Preparation method of high-performance SiCf/SiC composite material
The invention provides the preparation method of the high-performance SiCf/SiC composite material, the composite material takes SiC fiber as a reinforcement and silicon carbide as a matrix, and the volume fraction of the SiC fiber is 35-45%; the preparation method comprises the following steps: S1, sequentially carrying out high-temperature heat treatment, chemical vapor deposition cracking of a carbon interface layer and chemical vapor deposition of a SiC matrix on a SiC fiber preform to obtain a first density intermediate; s2, solid polycarbosilane and xylene are prepared into a SiC precursor solution; s3, performing vacuum impregnation on the first-density intermediate in the SiC precursor solution prepared in the S2, and performing cross-linking curing and cracking in sequence to obtain a precursor impregnated and cracked SiC matrix; s4, repeating the step S3 for 5-7 times to obtain a second-density intermediate; s5, dipping the second density intermediate in a polycarbosilane solution, and then carrying out in-situ cross-linking curing and cracking; and S6, repeating the S5 for 2-4 times.
提供了一种高性能SiCf/SiC复合材料的制备方法，复合材料以SiC纤维为增强体，以碳化硅为基体，SiC纤维的体积分数为35‑45%；其制备方法包括：S1、SiC纤维预制件依次进行高温热处理、化学气相沉积裂解碳界面层、化学气相沉积SiC基体，得到第一密度中间体；S2、将固态聚碳硅烷与二甲苯配制成SiC先驱体溶液；S3、将第一密度中间体真空浸渍于S2制得的SiC先驱体溶液中，依次交联固化、裂解，得到先驱体浸渍裂解SiC基体；S4、重复S3周期5‑7次，得到第二密度中间体；S5、将第二密度中间体浸渍在聚碳硅烷溶液中，然后进行原位交联固化、裂解；S6、重复S5周期2‑4次。
Preparation method of high-performance SiCf/SiC composite material
The invention provides the preparation method of the high-performance SiCf/SiC composite material, the composite material takes SiC fiber as a reinforcement and silicon carbide as a matrix, and the volume fraction of the SiC fiber is 35-45%; the preparation method comprises the following steps: S1, sequentially carrying out high-temperature heat treatment, chemical vapor deposition cracking of a carbon interface layer and chemical vapor deposition of a SiC matrix on a SiC fiber preform to obtain a first density intermediate; s2, solid polycarbosilane and xylene are prepared into a SiC precursor solution; s3, performing vacuum impregnation on the first-density intermediate in the SiC precursor solution prepared in the S2, and performing cross-linking curing and cracking in sequence to obtain a precursor impregnated and cracked SiC matrix; s4, repeating the step S3 for 5-7 times to obtain a second-density intermediate; s5, dipping the second density intermediate in a polycarbosilane solution, and then carrying out in-situ cross-linking curing and cracking; and S6, repeating the S5 for 2-4 times.
提供了一种高性能SiCf/SiC复合材料的制备方法，复合材料以SiC纤维为增强体，以碳化硅为基体，SiC纤维的体积分数为35‑45%；其制备方法包括：S1、SiC纤维预制件依次进行高温热处理、化学气相沉积裂解碳界面层、化学气相沉积SiC基体，得到第一密度中间体；S2、将固态聚碳硅烷与二甲苯配制成SiC先驱体溶液；S3、将第一密度中间体真空浸渍于S2制得的SiC先驱体溶液中，依次交联固化、裂解，得到先驱体浸渍裂解SiC基体；S4、重复S3周期5‑7次，得到第二密度中间体；S5、将第二密度中间体浸渍在聚碳硅烷溶液中，然后进行原位交联固化、裂解；S6、重复S5周期2‑4次。
Preparation method of high-performance SiCf/SiC composite material
一种高性能SiCf/SiC复合材料的制备方法
WANG YANFEI (author) / CHEN XIANGJIAN (author) / LIU RONGJUN (author) / WAN FAN (author) / LI JUNSHENG (author) / LI DUAN (author)
2023-03-21
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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