Recent progress on wet-oxygen corrosion resistance of SiC_f/SiC composites

Being an aero-engine hot-end structural material, silicon carbide fiber (SiC_f) reinforced silicon carbide (SiC) ceramic matrix composites (SiC_f/SiC) display remarkable application potential. The wet-oxygen environment inside the aero-engine erodes the composites and leads to their performance degradation, which has become a key factor limiting the long-time service of SiC_f/SiC. Finding an appropriate way to improve the wet-oxygen corrosion resistance of the composites is worthy of attention. This paper briefly analyzes the mechanisms of wet-oxygen corrosion and reviews the research progress in modified SiC_f/SiC from three aspects: coatings, matrix, and interface. At last, the future development trend of the composites against the wet-oxygen environment is prospected.