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AssigneeGeneral Electric Company
InventorsAlok Mani Srivastava, Anant Achyut Setlur, Holly Ann Comanzo, John William Devitt, James Anthony Ruud, Luke Nathaniel Brewer
Estimating the term…
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.
A method for determining at least one of past-service conditions and remaining useful life of at least one of a component of a combustion engine and a thermal barrier coating thereof, said method comprising:
A method for determining at least one of past-service conditions and remaining useful life of at least one of a component of a combustion engine and a thermal barrier coating thereof, said method comprising:
An apparatus for determining at least one of past-service conditions and remaining useful life of at least one of a component of a combustion engine and a thermal barrier coating thereof, said apparatus comprising:
A thermal barrier coating on an engine component, said thermal barrier coating comprising zirconia and at least one metal oxide that is capable of retarding a formation of a zirconia monoclinic phase when said engine component is exposed to elevated temperatures, said at least one metal oxide being doped with at least one metal ion that is excitable by a first radiation having a first wavelength range and emits a second radiation having a second wavelength range in response to an excitation by said first radiation, a spectrum of said second radiation having a characteristic property that is identifiable with and quantifiable in relation to an amount of the zirconia monoclinic phase.
A thermal barrier coating on an engine component, said thermal barrier coating consisting essentially of zirconia and at least one metal oxide that is capable of retarding a formation of a zirconia monoclinic phase when said engine component is exposed to thermal cycling, said at least one metal oxide being doped with at least one metal ion that is excitable by a first radiation having a first wavelength range and emits a second radiation having a second wavelength range in response to an excitation by said first radiation, a spectrum of said second radiation having an characteristic property that is identifiable with and quantifiable in relation to an amount of the monoclinic phase;
Dependencies are inferred from the claim text.