NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Alkali metal compatibility testing of candidate heater head materials for a Stirling engine heat transport systemThe authors describe work performed as part of the 25-kWe advanced Stirling conversion system project. Liquid alkali metal compatibility is being assessed in an ongoing test program to evaluate candidate heater head materials and fabrication processes at the temperatures and operating conditions required for Stirling engines. Specific materials under evaluation are alloy 713LC, alloy 713LC coated with nickel aluminide, and Udimet 720, each in combination with Waspaloy. The tests were run at a constant 700 C. A eutectic alloy of sodium and potassium (NaK) was the working fluid. Titanium sheet in the system was shown to be an effective oxygen getter. Metallographic and microchemical examination of material surfaces, joints, and their interfaces revealed little or no corrosion after 1000 h. Tests are in progress, with up to 10,000 h exposure.
Document ID
19920068205
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Noble, Jack E.
(NASA Lewis Research Center Cleveland, OH, United States)
Hickman, Gary L.
(Stirling Technology Co. Richland, WA, United States)
Grobstein, Toni
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Spacecraft Propulsion And Power
Meeting Information
Meeting: IECEC ''91: Intersociety Energy Conversion Engineering Conference
Location: Boston, MA
Country: United States
Start Date: August 4, 1991
End Date: August 9, 1991
Accession Number
92A50829
Funding Number(s)
CONTRACT_GRANT: DEN3-377
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available