抗水氧腐蚀致密环境障涂层研究进展

EBCs were coated on the surfaces of SiC-CMCs to effectively isolate the engine corrosive environment and avoid rapid corrosion failure of the components, which become the key for the applications of SiC-CMCs to hot section components of gas turbine engines. However, interconnected pores were formed in coatings, causing rapid degradation in a combustion environment containing high-temperature water vapor and oxygen. The research progresses of the effects of EBCs materials properties, preparation technologies, and processing parameters on the pore structure were summarized. The effects of pore structure on the water vapor corrosion resistance was analyzed, and the research progresses of EBCs densification were summarized. Finally, future research on the preparation of dense EBCs to improve their water vapor resistance was prospected.