Method for producing columnar grain ceramic thermal barrier coatings
AssigneeUnited Technologies Corporation
InventorThomas E. Strangman
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Abstract
A coated article and method for producing the coated article are described. The article is coated with a system which provides protection against oxidation and corrosion and which significantly reduces the substrate temperature. An MCrAlY layer is applied to the article to be protected and a columnar grain ceramic is applied by vapor deposition to the MCrAlY coated article. An alumina layer which exists between the MCrAly layer and the columnar ceramic layer provides for the adherence of the columnar layer to the MCrAlY layer.
Claims9
A method for producing a metallic article having a durable ceramic thermal barrier coating thereon, said method consisting essentially of:
- a. providing a superalloy substrate with a clean surface
- b. applying a thin adherent layer of MCrAlY to the clean surface
- c. developing a thin uniform adherent alumina layer on the MCrAlY layer
- d. applying a columnar ceramic coating to the alumina layer by vapor deposition.
Dependencies are inferred from the claim text.