Patent ID: 7094450
Filing Date: 2006-08-22
Classification: C23C,F01D,F05D,Y10T

Abstract:
1. A method for repairing a thermal barrier coating applied by physical vapor deposition to an underlying aluminide diffusion coating that overlays a metal substrate of at least one part of an assembled turbine component, the method comprising the steps of: (1) while the turbine component is in an assembled state, removing the physical vapor deposition-applied thermal barrier coating from the underlying aluminide diffusion coating of the least one part; (2) roughening the diffusion coating to make it more receptive to adherence of a plasma spray-applied overlay alloy bond coat layer; (3) plasma spraying an overlay alloy bond coat material on the roughened diffusion coating to form an overlay alloy bond coat layer; and (4) plasma spraying a ceramic thermal barrier coating material on the overlay alloy bond coat layer to form a thermal barrier coating.