14. Thermal Wave Imaging Application in Thermal Barrier Coatings

  1. Dongming Zhu and
  2. Kevin Plucknett
  1. B. Franke1,
  2. Y. H. Sohn1,
  3. X. Chen2,
  4. J. R. Price2 and
  5. Z. Mutasim2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291238.ch14

Advances in Ceramic Coatings and Ceramic-Metal Systems: Ceramic Engineering and Science Proceedings, Volume 26, Number 3

Advances in Ceramic Coatings and Ceramic-Metal Systems: Ceramic Engineering and Science Proceedings, Volume 26, Number 3

How to Cite

Franke, B., Sohn, Y. H., Chen, X., Price, J. R. and Mutasim, Z. (2005) Thermal Wave Imaging Application in Thermal Barrier Coatings, in Advances in Ceramic Coatings and Ceramic-Metal Systems: Ceramic Engineering and Science Proceedings, Volume 26, Number 3 (eds D. Zhu and K. Plucknett), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291238.ch14

Author Information

  1. 1

    University of Central Florida Advanced Materials Processing and Analysis Center and Department of Mechanical, Materials and Aerospace Engineering P.O. Box 162455, Orlando, FL 32816

  2. 2

    Solar Turbines Incorporated 2200 Pacific HWY; Mail Zone R-l, P.O. Box 85376 San Diego, CA 92101

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982336

Online ISBN: 9780470291238

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Keywords:

  • microscopy;
  • plasma;
  • catastrophic;
  • aluminum;
  • microgrnphs

Summary

Thermal wave imaging (TWI) is a promising non-destructive evaluation (NDE) technique for life assessment and health monitoring of thermal barrier coatings (TBCs) extensively used for advanced gas turbine engines. In this study, 9 specimens of air plasma sprayed (APS) TBCs were thermally cycled to a peak temperature of 1150°C (2100°F) with dwell time of 10 hours. During thermal cyclic oxidation, TBC specimens were periodically evaluated non-destructively with TWI, and selected specimens were removed from thermal cycling for microstructural analysis by scanning electron microscopy (SEM). Results from TWI were correlated to the microstructural development in APS TBCs. TWI enabled the detection of subsurface damage initiation and progression in APS TBCs.