Zhang, Hedong and Takeuchi, Yusuke and Chong, William W. F. and Mitsuya, Yasunaga and Fukuzawa, Kenji and Itoh, Shintaro (2018) Simultaneous in situ measurements of contact behavior and friction to understand the mechanism of lubrication with nanometer-thick liquid lubricant films. Tribology International, 127 . pp. 138-146. ISSN 0301-679X
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Official URL: https://doi.org/10.1016/j.triboint.2018.05.043
Abstract
A high-performance microscopic observation system was developed and integrated with a purpose-built pin-on-disk type tribotester. This allows for simultaneous in situ measurements of the vertical displacement and friction force of a pin sliding on disks lubricated with nanometer-thick liquid films at velocities up to 0.1 m/s, with accuracies of approximately 0.6 nm and 10 μN. Upward pin displacement was observed, exhibiting an exponential increase followed by a slight increase with increasing sliding velocity. The pin displacement also increased with film thickness and lubricant viscosity. We conclude that even nanometer-thick liquid lubricant films can generate upward dynamic pressure. Further insight into the shearing process was gained by analyzing the measured friction forces using the Eyring thermal activation energy approach.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | nano-lubrication, friction |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Mechanical Engineering |
| ID Code: | 84167 |
| Deposited By: | Siti Nor Hashidah Zakaria |
| Deposited On: | 16 Dec 2019 03:20 |
| Last Modified: | 16 Dec 2019 03:20 |
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