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Mechanical property measurements of plasma-sprayed thermal-barrier coatings subjected to oxidationTechniques have been developed for measuring the tensile properties of plasma-sprayed coatings which are used in thermal barrier applications. The measurements have included the average Young's modulus, bond strength and elongation at failure. The oxidation behavior of the bond coat plays an important role in the integrity and adhesion of plasma-sprayed thermal barrier coatings. This work studies the nature of the high temperature degradation on the mechanical properties of the coating. Furnace tests have been carried out on U-700 alloy with bond coats of NiCrAlY or NiCrAlZr and an overlay of ZrO2-8 percent Y2O3. Weight gain measurements on the coatings have been examined with relation to the adhesion strength and failure observations. The results from an initial study are reported in this work.
Document ID
19850047578
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Berndt, C. C.
(NASA Lewis Research Center Cleveland, OH, United States)
Miller, R. A.
(NASA Lewis Research Center Surface Protection Section, Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
August 1, 1984
Publication Information
Publication: Ceramic Engineering and Science Proceedings
Volume: 5
ISSN: 0196-6219
Subject Category
Nonmetallic Materials
Accession Number
85A29729
Distribution Limits
Public
Copyright
Other

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