Chapter 9. Anisotropic Thermal Expansion Effects in Plasma-Sprayed ZrO2-8%-Y2O3 Coatings

  1. William Smothers
  1. Chris C. Berndt and
  2. Herbert Herman

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320167.ch9

Proceedings of the 7th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 4, Issue 9/10

Proceedings of the 7th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 4, Issue 9/10

How to Cite

Berndt, C. C. and Herman, H. (2008) Anisotropic Thermal Expansion Effects in Plasma-Sprayed ZrO2-8%-Y2O3 Coatings, in Proceedings of the 7th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 4, Issue 9/10 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320167.ch9

Author Information

  1. Thermal Spray Lab, Department of Materials Science and Engineering State University of New York, Stony Brook, NY 11794

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1983

ISBN Information

Print ISBN: 9780470374047

Online ISBN: 9780470320167

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Keywords:

  • anisotropic;
  • expansion;
  • description;
  • considerations;
  • relaxation

Summary

The thermal expansion properties of plasma-sprayed ZrO2-8-wt%-Y2O3 coatings, detached from the substrate, have been examined. Coatings were heat-treated in air or in argon. Anisotropic effects in the longitudinal (planar to the substrate surface) and transverse (perpendicular to the substrate surface) directions were measured and related to the coating structure. The thermal expansion coefficient of the coating is discussed in terms of the material's properties such as the crack network and inter-lamellar boundary distribution. A precise model for the expansion behavior of coatings still needs attention since no description of all of the contributing variables exists. A quantitative analysis of thermal properties of coatings will aid in future design and modeling of coating systems.