次世代耐環境コーティングの実機使用環境を考慮した損傷挙動に関する研究

抄録

In order to develop reliability of Environmental Barrier Coatings (EBCs) for ceramic matrix composite, effects of high temperature aging on pore structure and thermo-mechanical properties of an atmospheric plasma sprayed BSAS (BaO-SrO-Al₂O₃-2SiO₂) coating and Mullite (3Al₂O₃-SiO₂) coating were investigated. EBCs have an important role to protect substrate from environmental attacks. Free-standing coating specimens of BSAS and Mullite were prepared. The cross-sectional SEM observation was carried out on EBC coatings, and the microstructure of the coating was identified. The elastic modulus of the coating was measured by micro-indentation testing. The measurement of thermal expansion coefficient of the coating was also carried out in this study.