Chapter 5. Mechanical Property Measurements of Plasma-Sprayed Thermal-Barrier Coatings Subjected to Oxidation

  1. William Smothers
  1. Christopher C. Berndt and
  2. Robert A. Miller

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320228.ch5

Proceedings of the 8th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 5, 7/8

Proceedings of the 8th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 5, 7/8

How to Cite

Berndt, C. C. and Miller, R. A. (1984) Mechanical Property Measurements of Plasma-Sprayed Thermal-Barrier Coatings Subjected to Oxidation, in Proceedings of the 8th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 5, 7/8 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320228.ch5

Author Information

  1. National Aeronautics and Space Administration Surface Protection Section, MS 105–1 Cleveland, OH 44135

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1984

ISBN Information

Print ISBN: 9780470374139

Online ISBN: 9780470320228

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Keywords:

  • plasma-sprayed thermal barrier coatings;
  • tensile adhesion test;
  • substrate interfacial failure;
  • tensile tests;
  • bond-coated specimens

Summary

Techniques have been developed for measuring the tensile properties of plasmasprayed coatings which are used in thermal barrier applications. The measurements have included the average Young's modulus, bond strength and elongation at failure. The oxidation behavior of the bond coat plays an important role in the integrity and adhesion of plasma-sprayed thermal barrier coatings. This work studies the nature of the high temperature degradation on the mechanical properties of the coating. Furnace tests have been carried out on U-700 alloy with bond coats of NiCrAlY or NiCrAIZr and an overlay of ZrO2-8%Y2O3 Weight gain measurements on the coatings have been examined with relation to the adhesion strength and failure observations. The results from an initial study are reported in this work.