Chapter 30. Failure and Acoustic-Emission Response of Plasma-Sprayed ZrO2-8 wt% Y2O3 Coatings

  1. William J. Smothers
  1. N. R. Shanker,
  2. C. C. Berndt and
  3. H. Herman

Published Online: 26 MAR 2008

DOI: 10.1002/9780470318782.ch30

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

Shanker, N. R., Berndt, C. C. and Herman, H. (1982) Failure and Acoustic-Emission Response of Plasma-Sprayed ZrO2-8 wt% Y2O3 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.ch30

Author Information

  1. Dept. 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 1982

ISBN Information

Print ISBN: 9780470373972

Online ISBN: 9780470318782

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Keywords:

  • characteristics;
  • tensile-adhesion-test;
  • understanding;
  • mechanisms;
  • specifications

Summary

It is critical to understand fundamental failure processes in order to design coatings for engineering purposes. The failure of ZrO2-8 wt% Y2O3 plasma-sprayed coatings is examined in the present work. The coatings were incorporated in a tensile-adhesion test arrangement and the acoustic emission (AE) was monitored. The AE generated during failure is related to the cracking process, and these are both related to the fracture morphology. Heat treatment of the coating affected changes in the AE count-rate distribution. This may be interpreted in terms of the morphological features of the coating. The relationship of the bond-strength tests to AE and fracture behavior give insight into the mechanism of adhesion of plasma-sprayed coatings.