Multilayer thermal barrier coatings

Details Multilayer thermal barrier coatings Multilayer thermal barrier coatings

C - Chemistry, Metallurgy

23

C

C23C 4/10 (2006.01) C23C 4/02 (2006.01) C23C 28/00 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2306941

The present invention relates to a thin impermeable top coat on a thermal barrier coating for a metal part, such as a turbine blade, wherein the composite thin top coat is a porous, inert, non-sacrificial, less permeable ceramic layer that eliminates the infiltration of environmental contaminants into the thermal barrier coating during operation of the metal part, thereby extending the life of the underlying thermal barrier coating and metal part thereunder.

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