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Low Pressure Plasma Sprayed Overlay Coatings for GRCop-84 Combustion Chamber Liners for Reusable Launch VehiclesAn advanced Cu-8(at.%)Cr-4%Nb alloy developed at NASA's Glenn Research Center, and designated as GRCop-84, is currently being considered for use as combustor chamber liners and nozzle ramps in NASA s future generations of reusable launch vehicles (RLVs). However, past experience has shown that unprotected copper alloys undergo an environmental attack called "blanching" in rocket engines using liquid hydrogen as fuel and liquid oxygen as the oxidizer. Potential for sulfidation attack of the liners in hydrocarbon-fueled engines is also of concern. Protective overlay coatings alloys are being developed for GRCop-84. The development of this coatings technology has involved a combination of modeling, coatings development and characterization, and process optimization. Coatings have been low pressure plasma sprayed on GRCop-84 substrates of various geometries and shapes. Microstructural, mechanical property data and thermophysical results on the coated substrates are presented and discussed.
Document ID
20050201798
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Raj, S. V.
(NASA Glenn Research Center Cleveland, OH, United States)
Barrett, C.
(NASA Glenn Research Center Cleveland, OH, United States)
Ghosn, L. J.
(Ohio Aerospace Inst. Cleveland, OH, United States)
Lerch, B.
(NASA Glenn Research Center Cleveland, OH, United States)
Robinson,
(QSS Group, Inc. Cleveland, OH, United States)
Thorn, G.
(Plasma Processes, Inc. Huntsville, AL, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Metals And Metallic Materials
Meeting Information
Meeting: ASM Fall Meeting
Location: Columbus, OH
Country: United States
Start Date: October 18, 2004
End Date: October 21, 2004
Distribution Limits
Public
Copyright
Other

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