| abstract |
Self-healing thermal barrier coating (TBC) system (450) includes a substrate (420), an improved metal-based bond coat (435) overlying the substrate, and a ceramic overlying the bond coat. It has a top coat (440). The bond coat (435) comprises a ceramic oxide precursor that is capable of forming a non-alumina ceramic oxide composition when exposed to a thermally conditioned oxidizing environment. Embodiments of such bond coats (435) contain 1 to 20 weight percent rare earth elements and about 5 to 30 weight percent Hf or about 2 to 20 weight percent Zr. Do it. Such a bond coat (435) or an improved bond coat chemical thereof may be used in conjunction with a conventional bond coat (433, 437) or conventional bond coat chemical to provide examples of self-healing TBC systems (400, 402, 404) is provided. [Selection] Figure 4A |