耐環境コーティングの微視組織と機械的特性に及ぼす高温曝露の影響

抄録

In order to develop the environmental barrier coating for ceramic matrix composite, effect of high temperature aging on the pore structure and the mechanical properties of an atmospheric plasma sprayed Mullite (3Al₂O₃-SiO₂) coating and BSAS (BaO-SrO-Al₂O₃-2SiO₂) coating was investigated. In this study, the free-standing Mullite and BSAS coating specimens were prepared and the cross-sectional SEM observation was carried out to analyze the pore structure of coating. The elastic modulus and the fracture strength of the coatings were evaluated by means of the micro-indentation test.