Radiant energy – Luminophor irradiation
Reexamination Certificate
2005-09-13
2005-09-13
Gabor, Otilia (Department: 2878)
Radiant energy
Luminophor irradiation
C250S459100
Reexamination Certificate
active
06943357
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.
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Brewer Luke Nathaniel
Comanzo Holly Ann
Devitt John William
Ruud James Anthony
Setlur Anant Achyut
DiConza Paul J.
Gabor Otilia
Powell, III William E.
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