Chapter 29. Creep of Plasma-Sprayed-ZrO2 Thermal-Barrier Coatings

  1. William J. Smothers
  1. R. F. Firestone1,
  2. W. R. Logan1,
  3. J. W. Adams1 and
  4. R. C. Bill Jr2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470318782.ch29

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

How to Cite

Firestone, R. F., Logan, W. R., Adams, J. W. and Bill, R. C. (1982) Creep of Plasma-Sprayed-ZrO2 Thermal-Barrier Coatings, in Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10 (ed W. J. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470318782.ch29

Author Information

  1. 1

    IIT Research Institute 10 W. 35th St., Chicago, IL 60616

  2. 2

    NASA-Lewis Research Center Cleveland, OH 44135

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1982

ISBN Information

Print ISBN: 9780470373972

Online ISBN: 9780470318782

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Keywords:

  • specimens;
  • compressive;
  • proportionally;
  • postspraying;
  • untested specimens

Summary

Specimens of plasma-sprayed-zirconia thermal-barrier coatings with three different porosities and different initial particle sizes were deformed in compression at initial loads of 6900, 13 800, and 24 100 kPa (1000, 2000, and 3500 psi) and temperatures of 1100°, 1250°, and 1400°C. The coatings were stabilized with lime, MgO, and two different concentrations of Y2O3. Creep began as soon as the load was applied and continued at a constantly decreasing rate until the load was removed. Temperature and stabilization had a pronounced effect on creep rate while the stress, particle size, and porosity had a lesser effect. Creep deformation was due to cracking and particle sliding.