Chapter 30. Measurement of Delamination Size and Depth in Ceramic Matrix Composites Using Pulsed Thermal Imaging

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. J. G. Sun1,
  2. S. Erdman1 and
  3. L. Connolly2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294826.ch30

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

How to Cite

Sun, J. G., Erdman, S. and Connolly, L. (2003) Measurement of Delamination Size and Depth in Ceramic Matrix Composites Using Pulsed Thermal Imaging, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294826.ch30

Author Information

  1. 1

    Argonne National Laboratory, Argonne, IL 60439

  2. 2

    GE Power Systems, Newark, DE 19713

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375846

Online ISBN: 9780470294826

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Keywords:

  • pulsed thermal imaging;
  • delaminations;
  • ceramic matrix composites;
  • optimal sensitivity;
  • theoretical sensitivity

Summary

A pulsed thermal imaging (PTI) method was developed to determine the size and depth of delaminations in ceramic matrix composites (CMCs). In this method, pulsed heat energy is applied to the surface of a sample, and the decay of the surface temperature is then measured and analyzed to produce a depth image of the sample. The sensitivity and accuracy of the PTI method were determined from experiments using a melt-infiltrated CMC sample with drilled flat-bottom holes at the back surface to serve as “delaminations”. A 3-D transient-heat-transfer code was used to simulate the experimental heat transfer process within the samples and to determine the optimal sensitivity for delamination detection by the PTI method.