Lubrication by an extremely thin film has become very important in micro machines, magnetic recording disks and so on. Molecularly thin perfluoropolyether (PFPE) films are considered a good lubricant for these micro devices. When the thickness of the PFPE film is thinned to several nanometers, it is possible to assume that the film consists of mobile and chemically bonded molecules. In this paper, we investigated the role of these molecules from the viewpoint of the vibrational stability of the sliding ball with the disk surface. From experiments by the ball on disk type tribotester, it is found that chemically bonded molecules prevent direct contact between the slider and the disk surface. Furthermore, when mobile molecules exist on bonded molecules, the stability is improved in wide load range.
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ASME/STLE 2004 International Joint Tribology Conference
October 24–27, 2004
Long Beach, California, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4181-2
PROCEEDINGS PAPER
Effects of Mobile and Chemically Bonded Molecules of Molecularly Thin Lubricant Film on the Vibrational Stability of a Sliding Ball
Kentaro Tanaka,
Kentaro Tanaka
Tokyo University of Marine Science and Technology, Tokyo, Japan
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Masahiro Kawaguchi,
Masahiro Kawaguchi
National Institute of Advanced Industrial Science and Technology, Tsukuba-shi, Ibaraki, Japan
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Takahisa Kato,
Takahisa Kato
National Institute of Advanced Industrial Science and Technology, Tsukuba-shi, Ibaraki, Japan
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Katsumi Iwamoto
Katsumi Iwamoto
Tokyo University of Marine Science and Technology, Tokyo, Japan
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Kentaro Tanaka
Tokyo University of Marine Science and Technology, Tokyo, Japan
Masahiro Kawaguchi
National Institute of Advanced Industrial Science and Technology, Tsukuba-shi, Ibaraki, Japan
Takahisa Kato
National Institute of Advanced Industrial Science and Technology, Tsukuba-shi, Ibaraki, Japan
Katsumi Iwamoto
Tokyo University of Marine Science and Technology, Tokyo, Japan
Paper No:
TRIB2004-64083, pp. 1441-1446; 6 pages
Published Online:
December 22, 2008
Citation
Tanaka, K, Kawaguchi, M, Kato, T, & Iwamoto, K. "Effects of Mobile and Chemically Bonded Molecules of Molecularly Thin Lubricant Film on the Vibrational Stability of a Sliding Ball." Proceedings of the ASME/STLE 2004 International Joint Tribology Conference. ASME/STLE 2004 International Joint Tribology Conference, Parts A and B. Long Beach, California, USA. October 24–27, 2004. pp. 1441-1446. ASME. https://doi.org/10.1115/TRIB2004-64083
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