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TITLE AND SUBTITLE:
Relative Lifetimes of MAPLUB Greases for Space Applications
AUTHOR(S):
Marchetti, Mario; Jones, William, R., Jr.; Sicre, Jacques
REPORT DATE:
2002-09-01
FUNDING NUMBERS:
WU-274-00-00-00
PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration John H. Glenn Research Center at Lewis Field Cleveland, Ohio 44135-3191
PERFORMING ORGANIZATION REPORT NUMBER:
E-13557
SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration Washington, DC 20546-0001
REPORT TYPE AND DATES COVERED:
Technical Memorandum
SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA/TM-2002-211875
SUPPLEMENTARY NOTES:
Mario Marchetti, National Research Council-National Research Associate at Glenn Research Center; William R. Jones, Jr., NASA Glenn Research Center; and Jacques Sicre, Centre National D'Etudes Spatiales, Dpartement Mcanismes, 18 avenue Edouard Belin, BPi 1416, 31055 Toulouse cedex, France. Responsible person, Mario Marchetti, organization code 5960, 216-433-5843.
ABSTRACT:
A Spiral Orbit Tribometer was employed to evaluate the tribological behavior and relative lifetimes of several commercially available greases under ultrahigh vacuum. These greases are either based on a multiply alkylated cyclopentane oil, or a perfluoropolyalkylether oil, and a thickener made of polytetrafluoroethylene (PTFE) telomer. The multiply alkylated cyclopentane (MAC) greases yielded long lifetimes, while perfluoropolyalkylether (PFPE) greases yielded short lifetimes.
SUBJECT TERMS:
Spiral orbiter tribometer; Space mechanisms
NUMBER OF PAGES:
16
PDF AVAILABLE FROM URL:
2002/TM-2002-211875.pdf ( 991 KB )
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