Material compatibility evaluation for liquid oxygen turbopump fluid foil bearingsThree series of tests were carried out on three polymer-coated Inconel substrate materials, Teflon S, polyimide bonded graphite fluoride (PBGF), and Teflon, which are considered for use in fluid foil bearings for a liquid oxygen turbopump. All the candidate materials passed the liquid oxygen frictional heating test. During the gaseous oxygen frictional heating test, all coatings wore off before ignition occured. Both Teflon S and PBGF coated foils passed 100 start/stop cycles against chrome-plated Inconel 718 shaft in the direct foil bearing lift-off simulation test in liquid oxygen.
Document ID
19920066341
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Stoltzfus, J. M. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Dees, J. (NASA Johnson Space Center Las Cruces, NM, United States)
Gu, A. (Allied-Signal Aerospace Co. Los Angeles, CA, United States)
Dolan, F. (NASA Marshall Space Flight Center Huntsville, AL, United States)