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Tribological characteristics of perfluoropolyether liquid lubricants under sliding conditions in high vacuumTribological characteristics of three PFPE's (Fomblin Z, Demnum, and Krytox) were studied under high vacuum using a four-ball apparatus with 440C steel specimens. Fomblin Z and Demnum exhibited initial scuffing-like high friction whereas Krytox did not. Steady state friction with Fomblin Z was the lowest among the three oils. Frictional values for Demnum and Krytox were almost the same. The lowest wear rate in air was provided by Krytox regardless of load, and low wear rates in vacuum at high load were achieved with Krytox and Demnum. Results are explained by reactivity and pressure-viscosity characteristics of the oils.
Document ID
19930023163
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Masuko, Masabumi (Tokyo Inst. of Tech. Japan)
Jones, William R., Jr. (NASA Lewis Research Center Cleveland, OH, United States)
Helmick, Larry S. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1993
Subject Category
Nonmetallic Materials
Report/Patent Number
NAS 1.15:106257
NASA-TM-106257
E-7980
Report Number: NAS 1.15:106257
Report Number: NASA-TM-106257
Report Number: E-7980
Meeting Information
Meeting: Eurotrib 1993 Conference
Location: Budapest
Country: Hungary
Start Date: August 30, 1993
End Date: September 2, 1993
Sponsors: Hungarian Society of Mechanical Engineers
Accession Number
93N32352
Funding Number(s)
PROJECT: RTOP 505-63-5A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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