Chapter 72. Crack Initiation and Propagation in Plasma Sprayed Thermal Barrier Coatings

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. Lihe Qian,
  2. Shijie Zhu and
  3. Yutaka Kagawa

Published Online: 27 MAR 2008

DOI: 10.1002/9780470294802.ch72

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

How to Cite

Qian, L., Zhu, S. and Kagawa, Y. (2003) Crack Initiation and Propagation in Plasma Sprayed Thermal Barrier Coatings, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294802.ch72

Author Information

  1. Institute of Industrial Science, The University of Tokyo, 153-8505, Japan

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375839

Online ISBN: 9780470294802

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Keywords:

  • mid-infrared reflectance;
  • yttria-stabilized zirconia;
  • thermal barrier coatings;
  • thermally grown oxide;
  • tube furnace

Summary

Crack initiation and propagation behavior in a plasma-sprayed thermal barrier coating under monotonic and cyclic loading was investigated. Sandwiched four point bending specimen with a notch perpendicular to the interface was designed and used. In-situ microscopic observation was made to monitor the process and path of crack propagation. An obvious rising R-curve for delamination crack propagation was obtained under monotonic loading. A deceleration phenomenon of fatigue crack propagation with crack extension was observed at low stress intensity factor.