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The role of microstructure and phase distribution in the failure mechanisms and life prediction model for PSZ coatingsPartially Stabilized Zirconia (PSZ) may become widely used for Thermal Barrier Coatings (TBC). Failure of these coatings can occur due to thermal fatigue in oxidizing atmospheres. The failure is due to the strains that develop due to thermal gradients, differences in thermal expansion coefficients, and oxidation of the bond coating. The role of microstructure and the cubic, tetragonal, and monoclinic phase distribution in the strain development and subsequent failure will be discussed. An X-ray diffraction technique for accurate determination of the fraction of each phase in PSZ will be applied to understanding the phase transformations and strain development. These results will be discussed in terms of developing a model for life prediction in PSZ coatings during thermal cycling.
Document ID
19890004279
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sisson, R. D., Jr.
(Worcester Polytechnic Inst. MA, United States)
Sone, Ichiro
(Worcester Polytechnic Inst. MA, United States)
Biederman, R. R.
(Worcester Polytechnic Inst. MA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1985
Publication Information
Publication: NASA, Lewis Research Center, Thermal Barrier Coatings. Abstracts and Figures
Subject Category
Nonmetallic Materials
Accession Number
89N13650
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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