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Title: Method And Apparatus For Determining Health Of Thermal Barrier Coatings

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.

Inventors:
 [1];  [1];  [1];  [2];  [3];  [2]
  1. Niskayuna, NY
  2. Clifton Park, NY
  3. Delmar, NY
Issue Date:
Research Org.:
GE Global Research, Niskayuna, New York (United States)
OSTI Identifier:
880356
Patent Number(s):
6943357
Application Number:
10/779826
Assignee:
General Electric Company (Niskayuna, NY)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
FC26-01NT41021
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Srivastava, Alok Mani, Setlur, Anant Achyut, Comanzo, Holly Ann, Devitt, John William, Ruud, James Anthony, and Brewer, Luke Nathaniel. Method And Apparatus For Determining Health Of Thermal Barrier Coatings. United States: N. p., 2005. Web.
Srivastava, Alok Mani, Setlur, Anant Achyut, Comanzo, Holly Ann, Devitt, John William, Ruud, James Anthony, & Brewer, Luke Nathaniel. Method And Apparatus For Determining Health Of Thermal Barrier Coatings. United States.
Srivastava, Alok Mani, Setlur, Anant Achyut, Comanzo, Holly Ann, Devitt, John William, Ruud, James Anthony, and Brewer, Luke Nathaniel. Tue . "Method And Apparatus For Determining Health Of Thermal Barrier Coatings". United States. https://www.osti.gov/servlets/purl/880356.
@article{osti_880356,
title = {Method And Apparatus For Determining Health Of Thermal Barrier Coatings},
author = {Srivastava, Alok Mani and Setlur, Anant Achyut and Comanzo, Holly Ann and Devitt, John William and Ruud, James Anthony and Brewer, Luke Nathaniel},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {9}
}

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Works referenced in this record:

Remote thermometry with thermographic phosphors: Instrumentation and applications
journal, July 1997


Nondestructive evaluation of the oxidation stresses through thermal barrier coatings using Cr 3+ piezospectroscopy
journal, December 1996