Chapter 77. Deformation and Strength Behavior of Plasma-Sprayed ZrO2-8wt% Y2O3 Thermal Barrier Coatings in Biaxial Flexure and Trans- Thickness Tension

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Sung R. Choi,
  2. Dongming Zhu and
  3. Robert A. Miller

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch77

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

How to Cite

Choi, S. R., Zhu, D. and Miller, R. A. (2000) Deformation and Strength Behavior of Plasma-Sprayed ZrO2-8wt% Y2O3 Thermal Barrier Coatings in Biaxial Flexure and Trans- Thickness Tension, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294635.ch77

Author Information

  1. NASA Glenn Research Center, Cleveland, OH 44 135

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375693

Online ISBN: 9780470294635

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Keywords:

  • thermal barrier coating;
  • ambient temperature;
  • unique layered structure;
  • plasma spraying;
  • trans thickness tension

Summary

The constitutive (load-strain) relations of thermal barrier coatings of plasma-sprayed ZrO2-8wt % Y2O3 were determined in both ring-on-ring biaxial flexure and trans-thickness tension at ambient temperature. The material exhibited a nonlinearity and hysteresis in the load-strain curves. The degree of nonlinearity appeared to be less in trans-thickness tension than in biaxial flexure. The corresponding constitutive load-strain relations were almost insensitive, independent of type of loading, both to the number of loading-and-unloading cycles and to the test rate. The fracture strength was found to be much lower in trans-thickness tension than in biaxial flexure. The lower strength in trans-thickness tension was attributed to a cleavage type of fracture, occuning due to the material's unique layered structure produced by plasma-spraying.