Patent ID: 6827969
Filing Date: 2004-12-07
Classification: C23C,Y02T

Abstract:
A method for locally repairing a damaged thermal barrier coating on a component surface, the method comprising the steps of:providing a ceramic coating composition comprising ceramic powders provided in two predetermined particle size ranges of less than 1 micron but greater than 30 nanometers and between about 45 microns to about 75 microns, respectively, fumed ceramic material with a particle size of no greater than 30 nanometers, and a binder suspended in a solvent, the binder being chosen from the group consisting of ceramic precursor binders that thermally decompose to form a refractory material; spraying the ceramic coating composition on a surface area of the component exposed by the localized damage to form an uncured coating, the uncured coating composition characterized by the ability to flow when subjected to a mechanical stress and to remain in place when the mechanical stress is removed; and curing the coating composition for a period sufficient to yield a dried coating that covers the surface area of the component, the dried coating comprising the ceramic powders and fumed ceramic material in a matrix with the binder.