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Overlay metallic-cermet alloy coating systemsA substrate, such as a turbine blade, vane, or the like, which is subjected to high temperature use is coated with a base coating of an oxide dispersed, metallic alloy (cermet). A top coating of an oxidation, hot corrosion, erosion resistant alloy of nickel, cobalt, or iron is then deposited on the base coating. A heat treatment is used to improve the bonding. The base coating serves as an inhibitor to interdiffusion between the protective top coating and the substrate. Otherwise, the protective top coating would rapidly interact detrimentally with the substrate and degrade by spalling of the protective oxides formed on the outer surface at elevated temperatures.
Document ID
19840025484
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Gedwill, M. A. (NASA Lewis Research Center Cleveland, OH, United States)
Levine, S. R. (NASA Lewis Research Center Cleveland, OH, United States)
Glasgow, T. K. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1984
Subject Category
Metallic Materials
Report/Patent Number
NAS 1.71:LEW-13639-1
Report Number: NAS 1.71:LEW-13639-1
Patent Application Number: US-PATENT-APPL-SN-403378
Patent Number: US-PATENT-4,446,199
Patent Number: NASA-CASE-LEW-13639-1
Accession Number
84N33555
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,446,199|NASA-CASE-LEW-13639-1
Patent Application
US-PATENT-APPL-SN-403378

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