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Apparatus for determining past-service conditions and remaining life of thermal barrier coatings and components having such coatings

United States Patent

May 4, 2004
View the Complete Patent at the US Patent & Trademark Office
An apparatus for determining past-service conditions and/or remaining useful life of a component of a combustion engine and/or a thermal barrier coating ("TBC") of the component comprises a radiation source that provides the exciting radiation to the TBC to excite a photoluminescent ("PL") material contained therein, a radiation detector for detecting radiation emitted by the PL material, and means for relating a characteristic of an emission spectrum of the PL material to the amount of a crystalline phase in the TBC, thereby inferring the past-service conditions or the remaining useful life of the component or the TBC.
Srivastava; Alok Mani (Niskayuna, NY), Setlur; Anant Achyut (Niskayuna, NY), Comanzo; Holly Ann (Niskayuna, NY), Devitt; John William (Clifton Park, NY), Ruud; James Anthony (Delmar, NY), Brewer; Luke Nathaniel (Rexford, NY)
General Electric Company (Niskayuna, NY)
09/ 683,385
December 20, 2001
FEDERAL RESEARCH STATEMENT This invention was first conceived or reduced to practice in the performance of work under contract DE-FC26-01NT41021 awarded by the United States Department of Energy. The United States of America may have certain rights to this invention.