SiC/SiC复合材料氧化退化研究进展

针对高速推进系统温度测量传感器的设计方法、测量误差等核心问题,综述了现阶段高速推进系统接触式和非接触式温度测量的方法。其中,重点综述了辐射与红外测量、可调谐二极管激光吸收光谱(TDLAS)、相干反斯托克斯拉曼散射(CARS)及温度敏感涂料(TSP)等非接触温度测量技术在高速推进系统应用的研究进展和发展趋势,并分析了上述温度测量技术存在的问题。

Research Progress of Oxidation Degradation of SiC/SiC Composites

The research progress of oxidation degradation of SiC/SiC composites was reviewed from three aspects: oxidation behavior, failure mechanism and mechanical properties of SiC/SiC composites under oxidizing atmosphere. Firstly, the critical factors that affect the oxidation behavior of materials were summarized including temperature, oxygen partial pressure, water vapor and the thickness of the interface layer et al. Secondly, the failure mechanism of the composites in different temperature ranges was analyzed in detail. Oxidative embrittlement is a crucial failure mechanism of SiC/SiC composites in the medium temperature range. While the failure of the composites at high temperatures is mainly caused by fiber strength degradation, fiber creep and interface oxidation. Then, it was concluded that interface oxidation consumption and fiber performance degradation are the key factors that cause the degradation of the mechanical properties of the composites. Finally, the existing problems and research directions were pointed out.