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AssigneeGeneral Electric Company
InventorsBhupendra K. Gupta, Jim D. Reeves, Bangalore A. Nagaraj
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An article is coated with a thermal barrier coating system to increase its thermal cyclic spallation life. A single layer bond coating is applied to the surface of the article to a surface roughness in the range of 200 to 600 microinches RA by low pressure plasma spraying of coarse MCrAlY alloy particles into the surface. A metal selected from aluminum and its alloys is applied to the bond coating by aluminiding and is diffused into the bond coating to provide an aluminum-rich bond coating metal outer surface, while substantially retaining the surface roughness of about 2300 to 600 microinches RA. A metal oxide thermal barrier coating layer is then applied onto the aluminum-rich bond coating outer surface.
A method for coating an article substrate with a thermal barrier coating system including a single layer bond coating having an inner portion disposed toward the substrate and an outer portion away from the substrate and facing a thermal barrier coating, comprising the steps of:
A method for coating an article substrate, wherein the article substrate is based on an element selected from the group consisting of Ni, Co and their mixtures, with a thermal barrier coating system including a single layer bond coating having an inner portion disposed toward the substrate and an outer portion away from the substrate and facing a thermal barrier coating, comprising the steps of:
Dependencies are inferred from the claim text.