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A new diffusion-inhibited oxidation-resistant coating for superalloysA concept for enhanced protection of superalloys consists of adding an oxidation- and diffusion-resistant cermet layer between the superalloy and the outer oxidation-resistant metallic alloy coating. Such a duplex coating was compared with a physical-vapor-deposited (PVD) NiCrAlY coating in cyclic oxidation at 1150 C. The substrate alloy was MA 754 - an oxide-dispersion-strengthened superalloy that is difficult to coat. The duplex coating, applied by plasma spraying, outperformed the PVD coating on the basis of weight change and both macroscopic and metallographic observations.
Document ID
19810024730
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Gedwill, M. A. (NASA Lewis Research Center Cleveland, OH, United States)
Glasgow, T. K. (NASA Lewis Research Center Cleveland, OH, United States)
Levine, S. R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
August 1, 1981
Subject Category
Metallic Materials
Report/Patent Number
E-968
NASA-TM-82687
Report Number: E-968
Report Number: NASA-TM-82687
Accession Number
81N33273
Funding Number(s)
PROJECT: RTOP 505-33-12
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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