| abstract |
A thermal barrier coating (TBC) system ( 450 ) capable of self-healing has a substrate ( 420 ), a metal-based advanced bond coat ( 435 ) overlying the substrate and a ceramic top coat ( 440 ) overlying the bond coat. The bond coat ( 435 ) comprises ceramic oxide precursor materials capable of forming a non-alumina ceramic oxide composition when exposed to a thermally conditioning oxidizing environment. Embodiments of such bond coat ( 435 ) comprise rare earth elements in a range of 1-20 weight percent, and Hf in a range of about 5 to 30 weight percent or Zr in a range of about 2 to 20 weight percent. Examples of self-healing TBC systems ( 400, 402, 404 ) are provided using such bond coat ( 435 ) or its advanced bond coat chemistries in combination with conventional bond coats ( 433, 437 ) or conventional bond coat chemistries. |