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Deformation and Tensile Cyclic Fatigue of Plasma-Sprayed ZrO2-8wt% Y2O3 Thermal Barrier CoatingsDeformation (constitutive relations) of free-standing, thick thermal barrier coatings of sprayed ZrO2-8Wt% Y2O3 was determined at ambient temperature in both pure tension and pure compression using cylindrical bar test specimens. The material exhibited both significant nonlinearity and hysteresis in its load-strain curves, The load-strain relations in four-point uniaxial flexure were determined from tension and compression sides and were compared with individual pure tension and compression constitutive data. Effect of sintering on deformation behavior was significant, resulting in a dramatic change in constitutive relation. Cyclic fatigue testing of the coating material in tension-tension at room temperature showed an insignificant susceptibility to fatigue, similar to the slow crack growth behavior of the material in flexure in 800 C air.
Document ID
20020033735
Acquisition Source
Glenn Research Center
Document Type
Reprint (Version printed in journal)
Authors
Choi, Sung R.
(Ohio Aerospace Inst. Cleveland, OH United States)
Zhu, Dong-Ming
(NASA Glenn Research Center Cleveland, OH United States)
Miller, Robert A.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Publication Information
Publication: Ceramic Engineering and Science Proceedings
Publisher: American Ceramic Society
Volume: 22
Subject Category
Nonmetallic Materials
Distribution Limits
Public
Copyright
Other

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