Silicon carbide ceramic matrix composites (SiC–CMC)

characterized by low density and hightemperature resistance

show broad application prospects in hot-section components of aero-engines. However

hightemperature wet-oxygen corrosion remains a key challenge restricting their applications. This article provides a comprehensive review of the wet-oxygen corrosion resistance

microstructure

mechanical properties and primary preparation methods when rare earth compounds: Including rare earth phosphates

rare earth silicates

rare earth oxides

rare earth silicide carbides

and Si–Y eutectic alloys

are incorporated into the SiC–CMC matrix

interphase and coatings. Furthermore

it presents the critical challenges and prospects for rare earth compound-modified SiC–CMC technology.