Thermal barrier and overlay coating systems comprising composite metal/metal oxide bond coating layers
AssigneeSiemens Westinghouse Power Corporation
InventorsJohn G. Goedjen, Stephen M. Sabol, Kelly M. Sloan, Steven J. Vance
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Abstract
The present invention generally describes multilayer coating systems comprising a composite metal/metal oxide bond coat layer. The coating systems may be used in gas turbines.
Claims14
A multilayer thermal barrier coating system comprising a thermal barrier coating layer deposited upon a high density metallic bond coating layer, the high density metallic bond coating layer deposited upon a diffusion resistant composite MCrAlY/metal oxide bond coating layer, and the composite MCrAlY/metal oxide bond coating layer deposited upon a substrate, wherein said diffusion resistance is provided by a method of deposition in which MCrAlY droplets become heavily decorated with oxides at the splat boundary during the deposition process.
A multilayer overlay coating system comprising a high density metallic bond coating layer deposited upon a diffusion resistant composite MCrAlY/metal oxide bond coating layer, the composite MCrAlY/metal oxide bond coating layer deposited upon a substrate, wherein said diffusion resistance is provided by a method of deposition in which MCrAlY droplets become heavily decorated with oxides at the splat boundary during the deposition process.
Dependencies are inferred from the claim text.