Patent ID: 7008522
Filing Date: 2006-03-07
Classification: C23C,F01D,F05D,Y02T

Abstract:
1. A method of locally repairing parts coated with a thermal barrier comprising a ceramic outer layer and a metal underlayer of alumina-forming alloy for protecting a substrate against oxidation and for bonding with the ceramic outer layer, the method comprising: defining the zone for repair with a first mechanical mask adapted to the shape of the part and the zone for repair; scouring the zone for repair so as to remove from said zone the ceramic, the alumina layer, and the damaged portions of the underlayer; supplying materials for repairing the underlayer to said zone by subjecting the partially-scoured part to metal deposition by an electrical current; and subjecting the part to heat treatment in order to enable the deposited metals to diffuse into the remaining underlayer in the zone for repair and to enable a surface film of alumina to form.