SiCf/SiC复合材料高温抗氧化研究进展

Research Progress on High Temperature Anti-oxidation of SiCf/SiC Composites

连续SiC纤维增韧SiC陶瓷基复合材料(SiCf/SiC CMCs)具有低密度、优异的高温力学性能和抗氧化性能,在航空发动机热端部件上具有广阔的应用前景,具备提高发动机推重比和使用温度、减轻无效重量、简化系统结构等显著优势。延长SiCf/SiC复合材料在航空发动机高温氧化环境下的服役寿命是当前需要解决的难题。本文从纤维、界面相、基体、表面涂层四个方面综述了SiCf/SiC复合材料高温抗氧化研究进展。采用多元多层自愈合界面相、对基体进行改性以及采用表面自愈合整体涂层都可以有效提高SiCf/SiC复合材料在高温氧化环境中的使用稳定性和寿命。

Continuous SiC fiber toughening SiC ceramic matrix composites （SiCf/SiC CMCs） have low density, excellent high temperature mechanical properties and oxidation resistance, and they have wide prospect of application in hot sections of aircraft engine components owing to their significant advantages of improving the sages ratio and using temperature, reducing invalid mass, simplifying the system structure. The current problem needing to solve is to extend the service life of SiCf/SiC composites in the high temperature oxidation environment of aero-engine. It has introduced the research progress of resistance to high temperature anti-oxidation from four aspects of fiber, interphase, matrix and surface coatings. Both applying multi-component and multi-layered self-healing interphase, modifying the matrix and using self-healing monolithic surface coating can effectively improve the using stability and durability of SiCf/SiC composites in the high temperature oxidation environment