Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-thermal-conductivity SiCf/SiC composite material and preparation method thereof
The invention discloses a high-thermal-conductivity SiCf/SiC composite material and a preparation method thereof. The method comprises the following steps: pretreating a KD-SA type SiC fiber preform; depositing and cracking a carbon interface layer on the surface of the pre-treated prefabricated part; placing the prefabricated member deposited with the carbon interface layer in a CVI SiC deposition furnace for chemical vapor deposition treatment to obtain an intermediate deposited with a CVI SiC matrix; dipping the intermediate in a liquid polycarbosilane precursor in vacuum for 5-8 hours, taking out, preserving heat for 1-3 hours at 140-160 DEG C under inert gas, preserving heat for 1-2 hours at 1000-1200 DEG C, cracking, cooling along with a furnace to obtain a crystalline PIP SiC matrix, and repeating vacuum dipping for 6-8 times; and finally, carrying out high-temperature heat treatment to obtain the high-thermal-conductivity SiCf/SiC composite material. The composite material has the characteristics of high thermal conductivity, excellent high-temperature mechanical properties and the like.
本发明公开了一种高导热SiCf/SiC复合材料及其制备方法，该方法包括：对KD‑SA型SiC纤维预制件进行预处理；在预处理后的预制件的表面沉积裂解一层碳界面层；将沉积有碳界面层的预制件置于CVI SiC沉积炉中进行化学气相沉积处理，得到沉积有CVI SiC基体的中间体；将中间体真空浸渍于液态聚碳硅烷先驱体中，浸渍5‑8h，取出后，在惰性气体下，140‑160℃保温1‑3h，然后在1000‑1200℃保温1‑2h进行裂解，之后随炉冷却，得到结晶性的PIP SiC基体，重复真空浸渍6‑8次；最好进行高温热处理，得到高导热SiCf/SiC复合材料。该复合材料具有高导热率和优异的高温力学性能等特点。
High-thermal-conductivity SiCf/SiC composite material and preparation method thereof
The invention discloses a high-thermal-conductivity SiCf/SiC composite material and a preparation method thereof. The method comprises the following steps: pretreating a KD-SA type SiC fiber preform; depositing and cracking a carbon interface layer on the surface of the pre-treated prefabricated part; placing the prefabricated member deposited with the carbon interface layer in a CVI SiC deposition furnace for chemical vapor deposition treatment to obtain an intermediate deposited with a CVI SiC matrix; dipping the intermediate in a liquid polycarbosilane precursor in vacuum for 5-8 hours, taking out, preserving heat for 1-3 hours at 140-160 DEG C under inert gas, preserving heat for 1-2 hours at 1000-1200 DEG C, cracking, cooling along with a furnace to obtain a crystalline PIP SiC matrix, and repeating vacuum dipping for 6-8 times; and finally, carrying out high-temperature heat treatment to obtain the high-thermal-conductivity SiCf/SiC composite material. The composite material has the characteristics of high thermal conductivity, excellent high-temperature mechanical properties and the like.
本发明公开了一种高导热SiCf/SiC复合材料及其制备方法，该方法包括：对KD‑SA型SiC纤维预制件进行预处理；在预处理后的预制件的表面沉积裂解一层碳界面层；将沉积有碳界面层的预制件置于CVI SiC沉积炉中进行化学气相沉积处理，得到沉积有CVI SiC基体的中间体；将中间体真空浸渍于液态聚碳硅烷先驱体中，浸渍5‑8h，取出后，在惰性气体下，140‑160℃保温1‑3h，然后在1000‑1200℃保温1‑2h进行裂解，之后随炉冷却，得到结晶性的PIP SiC基体，重复真空浸渍6‑8次；最好进行高温热处理，得到高导热SiCf/SiC复合材料。该复合材料具有高导热率和优异的高温力学性能等特点。
High-thermal-conductivity SiCf/SiC composite material and preparation method thereof
一种高导热SiCf/SiC复合材料及其制备方法
WANG YANFEI (Autor:in) / CHEN XIANGJIAN (Autor:in) / LIU RONGJUN (Autor:in) / LI DUAN (Autor:in)
28.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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