Performance and Durability of Advanced Environmental Barrier Coating Systems

[摘要] This paper summarizes recent NASA environmental barrier coating (EBC) material advances for protecting the SiC/SiC Ceramic Matrix Composites (CMCs) for meeting next generation turbine engine performance requirements. We particularly present an advanced multicomponent rare earth silicate EBCs with HfO2-Si bond coat system, the temperature capability, environmental stability, and thermomechanical durability, advanced laboratory testing toward subelement demonstrations. Fundamental coating properties of the coating system will also be discussed, with the emphasis on the coating diffusion barrier performance and Calcium Magnesium Alumino-Silicate (CMAS) resistance.

[发布日期] 2018-01-23

[学科分类] 复合材料

[关键词] PROTECTIVE COATINGS;TURBINE ENGINES;CERAMIC MATRIX COMPOSITES;THERMODYNAMICS