Patent ID: 7509735

Claim:
A system for in-frame repairing of a thermal barrier coating on a gas turbine component exposed to hot combustion gases comprising: an abrasive media comprising at least one of phenolic resin beads, coal, and a calcined petroleum product having a state change characteristic occurring at a temperature lower than an operating temperature of the gas turbine so that the abrasive media changes from a solid state to another state allowing the media to exit the gas turbine during operation; an abrasive media sprayer comprising: a media hopper for storing the abrasive media; a compressor for compressing a fluid to be mixed with the abrasive media for producing a pressurized mixed fluid/media spray; a spray conduit for conducting the spray from a location outside the gas turbine to a location inside the gas turbine; an outlet end of the spray conduit sufficiently small to be inserted through an inner casing of the gas turbine and within an enclosed portion of the gas turbine exposed to hot combustion gases for directing the spray at a desired surface portion of a component exposed to hot combustion gases within the enclosed portion of the gas turbine; and a return conduit for removing spent media and detritus abraded away from the surface portion of the component from within the enclosed portion to a location outside the gas turbine engine.