The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2005
Filed:
Feb. 17, 2004
Alok Mani Srivastava, Niskayuna, NY (US);
Anant Achyut Setlur, Niskayuna, NY (US);
Holly Ann Comanzo, Niskayuna, NY (US);
John William Devitt, Clifton Park, NY (US);
James Anthony Ruud, Delmar, NY (US);
Luke Nathaniel Brewer, Clifton Park, NY (US);
Alok Mani Srivastava, Niskayuna, NY (US);
Anant Achyut Setlur, Niskayuna, NY (US);
Holly Ann Comanzo, Niskayuna, NY (US);
John William Devitt, Clifton Park, NY (US);
James Anthony Ruud, Delmar, NY (US);
Luke Nathaniel Brewer, Clifton Park, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
A method 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 providing a photoluminescent ('PL') material in the TBC, directing an exciting radiation at the TBC, measuring the intensity of a characteristic peak in the emission spectrum of the PL material, and correlating the intensity of the characteristic peak or another quantity derived therefrom to an amount of a new phase that has been formed as a result of the exposure of the component to extreme temperatures. An apparatus for carrying out the method comprises a radiation source that provides the exciting radiation to the TBC, a radiation detector for detecting radiation emitted by the PL material, and means for relating a characteristic of the emission spectrum of the PL material to the amount of the new phase in the TBC, thereby inferring the past-service conditions or the remaining useful life of the component.