Method of applying a bond coating and a thermal barrier coating on a metal substrate, and related articles
AssigneeGeneral Electric Company
InventorsWayne Charles Hasz, Marcus Preston Borom, Warren Arthur Nelson, James Edward Viggiani, John Zanneti
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Abstract
A method for applying at least one bond coating on a surface of a metal-based substrate is described. A foil of the bond coating material is first attached to the substrate surface and then fused thereto, e.g., by brazing. The foil is often initially prepared by thermally spraying the bond coating material onto a removable support sheet, and then detaching the support sheet. Optionally, the foil may also include a thermal barrier coating applied over the bond coating. The substrate can be a turbine engine component.
Claims32
A method for applying at least one bond coating to a surface of a metal-based substrate, comprising the following steps:
- (a) attaching a foil which comprises the bond coating to the substrate surface, and then
- (b) fusing the foil to the substrate surface, so that the bond coating adheres to the substrate.
A method for applying a zirconia-based thermal barrier coating over a surface of a superalloy substrate, comprising the following steps:
- (a) attaching a foil which comprises at least one bond coating and an overlying zirconia-based thermal barrier coating to the substrate surface;
- and then
- (b) brazing the foil to the substrate surface.
A method for repairing a worn or damaged thermal barrier coating system applied over a metal-based substrate, said method comprising the following steps:
- (i) removing the worn or damaged thermal barrier coating system from a selected area on the substrate;
- (ii) attaching a foil which comprises the replacement thermal barrier coating system to the substrate surface, covering the selected area;
- and then
- (iii) fusing the foil to the substrate, so that the thermal barrier coating system adheres to the selected area on the substrate,
- wherein the thermal barrier coating system comprises at least one bond coating for contact with the substrate, and an overlying thermal barrier coating applied over the bond coating.
Dependencies are inferred from the claim text.