Publication :


Title:

Comparison of IR Thermography and Reflectance-Enhanced Photoluminescence for early Quantitative Diagnostic of Thermal Barrier Coatings Spallation

Authors: E. Copin, Y. Le Maoult, T. Sentenac, F. Blas, T.H.G. Tran and P. Lours
Year: juillet 2014
Proceedings de : 12th International Conference on Quantitative InfraRed Thermography (QIRT 2014), Bordeaux, 07 - 11 July 2014.


Abstract:
Spallation of Thermal Barrier Coatings (TBCs) in gas turbines is the result of the insidious initiation and propagation of microcracks at the interface with the substrate. This temperature driven mechanism is difficult to detect in its early stage and the difficulty of determining accurately the interface temperature hinders the development of reliable lifetime prediction models. In this work two non destructive diagnostic methods based on IR thermography and photoluminescence are compared for early damaging assessment of TBCs prepared by a sol-gel route containing pre-calibrated delaminated areas and integrating a Eu3+ doped photoluminescent layer at the interface with the substrate. The potential of the later method for through thickness temperature sensing is also discussed.

Bibtex citation :
@INPROCEEDINGS{Copin2014,
Author={Copin, E. and Le Maoult, Y. and Sentenac, T. and Blas, F. and Tran, T.H.G. and Lours, P.},
Title={Comparison of IR Thermography and Reflectance-Enhanced Photoluminescence for early Quantitative Diagnostic of Thermal Barrier Coatings Spallation},
Booktitle={12th International Conference on Quantitative InfraRed Thermography (QIRT 2014), Bordeaux, 07 - 11 July 2014},
Pages={},
Year={2014}}


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