Chapter 77. Deformation and Strength Behavior of Plasma-Sprayed ZrO2-8wt% Y2O3 Thermal Barrier Coatings in Biaxial Flexure and Trans- Thickness Tension
- Todd Jessen,
- Ersan Ustundag
Published Online: 28 MAR 2008
DOI: 10.1002/9780470294635.ch77
Copyright © 2000 The American Ceramic Society
Book Title
24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4
Additional Information
How to Cite
Choi, S. R., Zhu, D. and Miller, R. A. (2008) 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
Publication History
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 2000
Book Series:
ISBN Information
Print ISBN: 9780470375693
Online ISBN: 9780470294635
- Summary
- Chapter
- References
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.