This paper deals with the measurement of friction force exerted on molecularly thin lubricant film surfaces using a specially arranged pin-on-disk type friction tester. The measurements were carried out by sliding a 1.5-mm-diameter glass ball slider on a rotating disk surface with small loading force. Polar and non-polar PFPE lubricants were dip-coated on magnetic disks covered with diamond-like-carbon (DLC) film. Lubricant film thickness was varied to constitute multiple layered film structures on the DLC surface. To clarify the stratified effect of thin lubricant film on friction, a lightly loading force and a slow rotational speed were selected. The tested results showed that the friction force on non-polar lubricant surfaces increase slightly for mono-layer and multi-layer cases, while the friction force on polar lubricants show steady and gradual increase with increasing loading force. We conclude that friction force at small loading force is dependent intimately on the thickness, molecular weight and end-group functionality.
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World Tribology Congress III
September 12–16, 2005
Washington, D.C., USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4201-0
PROCEEDINGS PAPER
Comparisons of Friction Characteristics of a Lightly Loaded Pin Sliding Over Magnetic Disks Coated With Polar and Non-Polar PFPE Lubricants
Yinbo He,
Yinbo He
Nagoya University, Nagoya, Aichi, Japan
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Yasunaga Mitsuya,
Yasunaga Mitsuya
Nagoya University, Nagoya, Aichi, Japan
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Hedong Zhang,
Hedong Zhang
Nagoya University, Nagoya, Aichi, Japan
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Kenji Fukuzawa
Kenji Fukuzawa
Nagoya University, Nagoya, Aichi, Japan
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Yinbo He
Nagoya University, Nagoya, Aichi, Japan
Yasunaga Mitsuya
Nagoya University, Nagoya, Aichi, Japan
Hedong Zhang
Nagoya University, Nagoya, Aichi, Japan
Kenji Fukuzawa
Nagoya University, Nagoya, Aichi, Japan
Paper No:
WTC2005-64395, pp. 795-796; 2 pages
Published Online:
November 17, 2008
Citation
He, Y, Mitsuya, Y, Zhang, H, & Fukuzawa, K. "Comparisons of Friction Characteristics of a Lightly Loaded Pin Sliding Over Magnetic Disks Coated With Polar and Non-Polar PFPE Lubricants." Proceedings of the World Tribology Congress III. World Tribology Congress III, Volume 1. Washington, D.C., USA. September 12–16, 2005. pp. 795-796. ASME. https://doi.org/10.1115/WTC2005-64395
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