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A comparison of the lubricating mechanisms of graphite fluoride and molybdenum disulfide filmsA microscopic study of 440 C steel sliding surfaces lubricated by graphite fluoride or molybdenum disulfide solid lubricant rubbed films was conducted. The sliding surfaces, along with the friction, wear, and wear life were observed as a function of the number of sliding revolutions in three different atmospheres: moist air (10,000 ppm H2O), dry air (less than 20 ppm H2O), or dry argon (less than 20 ppm H2O). In general, the lubricating mechanisms of the two solid lubricants were found to be relatively similar; that is, a dynamic, thin, layer-like film (which sheared on relative motion) was formed between the two metallic surfaces. The mechanisms of failure were found to be somewhat different, however. Failure of MoS2 films was very dependent on atmospheric degradation, while that of graphite fluoride films was more dependent on flow of the lubricant film out of the contact zone
Document ID
19790032646
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Fusaro, R. L.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: International Conference on Solid Lubrication
Location: Denver, CO
Start Date: August 15, 1978
End Date: August 18, 1978
Accession Number
79A16659
Distribution Limits
Public
Copyright
Other

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