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Thermomechanical behavior of plasma-sprayed ZrO2-Y2O3 coatings influenced by plasticity, creep and oxidationThermocycling of ceramic-coated turbomachine components produces high thermomechanical stresses that are mitigated by plasticity and creep but aggravated by oxidation, with residual stresses exacerbated by all three. These residual stresses, coupled with the thermocyclic loading, lead to high compressive stresses that cause the coating to spall. A ceramic-coated gas path seal is modeled with consideration given to creep, plasticity, and oxidation. The resulting stresses and possible failure modes are discussed.
Document ID
19870009351
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Padovan, J. (Akron Univ. Ohio, United States)
Chung, B. T. F. (NASA Lewis Research Center Cleveland, OH, United States)
Mcdonald, Glen E. (NASA Lewis Research Center Cleveland, OH, United States)
Hendricks, Robert C. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
E-3385
NASA-TM-88940
NAS 1.15:88940
Accession Number
87N18784
Funding Number(s)
PROJECT: RTOP 553-13-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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