Thermal barrier coating/environmental barrier coating system for a silicon containing substrate to improve high temperature capability

摘要

In accordance with an embodiment of the invention, an article is provided. The article comprises a substrate (16) comprised of silicon containing material, an environmental barrier coating (EBC) (12) overlying the substrate (16) and a thermal barrier coating (TBC) (14) on the environmental barrier coating (12). The thermal barrier coating (14) comprising a compound having a rhombohedral phase.