Low thermal conductivity thermal barrier coating system and method therefor

摘要

In accordance with an embodiment of the invention, a thermal barrier coating for inclusion in a thermal barrier coating system is provided. The thermal barrier coating comprises a compound having a rhombohedral phase. In accordance with another embodiment of the invention, a thermal barrier coating is provided that comprises a compound having the formula of: A₄B₃O₁₂, wherein A is at least one rare earth element; and B is selected from the group consisting of Zr, Hf and mixtures thereof.