Abstract Rod-like SiOC ceramic in-situ reinforced carbon/carbon (C/C) composites have been synthesized in this work. The rod-like SiOC ceramic growth mechanism was investigated. By optimizing the interfaces, simultaneously, mechanical strength of C/Cs could be improved. Firstly, in order to protect and strengthen carbon fibers (CFs), about 200 nm carbon layer was deposited on the surface of CFs. Then SiOC ceramic were in-situ grown in the C/Cs preform. After the densification through TGCVI, the bending and ILSS test revealed that these optimal designs including the carbon buffer layer and SiOC reinforcements between the fiber/matrix (F/M) and matrix/matrix (M/M) interfaces endowed C/Cs with improved bending strength by 118.85% and ILSS by 92.2%, respectively. Raman results also demonstrated that the defects in C/C composites could be significantly reduced by introducing SiOC ceramic and optimizing carbon layer.

中文翻译：

---

通过棒状SiOC陶瓷优化PyC基体界面以提高碳/碳复合材料的机械性能

摘要 本工作合成了棒状SiOC陶瓷原位增强碳/碳（C/C）复合材料。研究了棒状SiOC陶瓷的生长机制。通过优化界面，同时可以提高 C/Cs 的机械强度。首先，为了保护和增强碳纤维（CFs），在CFs表面沉积了约200nm的碳层。然后在 C/Cs 预制棒中原位生长 SiOC 陶瓷。通过 TGCVI 致密化后，弯曲和 ILSS 测试表明，这些优化设计包括碳缓冲层和纤维/基体 (F/M) 和基体/基体 (M/M) 界面之间的 SiOC 增强材料赋予 C/Cs弯曲强度分别提高 118.85% 和 ILSS 92.2%。