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Luminescence-Based Diagnostics of Thermal Barrier Coating Health and PerformanceThermal barrier coatings (TBCs) are typically composed of translucent ceramic oxides that provide thermal protection for metallic components exposed to high-temperature environments in both air- and land-based turbine engines. For advanced turbine engines designed for higher temperature operation, a diagnostic capability for the health and performance of TBCs will be essential to indicate when a mitigating action needs to be taken before premature TBC failure threatens engine performance or safety. In particular, it is shown that rare-earth-doped luminescent sublayers can be integrated into the TBC structure to produce luminescence emission that can be monitored to assess TBC erosion and delamination progression, and to map surface and subsurface temperatures as a measure of TBC performance. The design and implementation of these TBCs with integrated luminescent sublayers are presented.
Document ID
Document Type
Eldridge, Jeffrey I.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 27, 2013
Publication Date
January 29, 2013
Subject Category
Composite Materials
Report/Patent Number
Meeting Information
37th International Conference on Advanced Ceramics and Composites(Daytona Beach, FL)
Funding Number(s)
WBS: WBS 794072.
Distribution Limits
Work of the US Gov. Public Use Permitted.
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