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	Friction and adhesion in boundary lubrication measured by microtribometers
	Liu, Y. ; Liu, S. ; Hild, W. ; Luo, J. ; Schaefer, J. A.
	2010-05-10 ; 2010-05-10
会议名称	TRIBOLOGY INTERNATIONAL ; 32nd Leeds-Lyon Symposium on Tribiology ; Lyon, FRANCE ; Web of Science
关键词	friction boundary lubrication microtribometer adhesion RATE-DEPENDENT FRICTION PHYSICAL ANALYSIS LAW Engineering, Mechanical
中文摘要	The measuring and modelling of friction are critically important for the motion control in nanopositioning, particularly when bearings are employed to cover the wide working distances. Since the positioning system usually operates at very low speed to achieve fine positioning, the boundary lubrication is the dominant regime. A detailed characterization of the friction of boundary lubrication formed by Poly-alpha-Olefin (PAO) with and without surfactant and a suspension of MoS2 in base oil has been performed in reciprocating sliding tests by steel/steel point contacts, and correlated with adhesion measurements by silicon/silicon point contacts. A microtribometer based on laser interferometers and glass springs, which can resolve 100 nN force in a speed range of 1-1000 mu m/s was employed to detect the minute changes in forces. We find that a simple linear function instead of a logarithmic function is possible to describe the relationship between the friction force and operating speed for all the lubricants tested, though the gradients are quite different and under the influence of normal load. Comparing to PAO+surfactant and MoS2 suspension, PAO shows a much higher load-dependent coefficient of friction. This result is further confirmed by the repulsion force measurements, which shows a higher increase of contact pressure with the increase of normal load for PAO. (c) 2006 Elsevier Ltd. All rights reserved.; Inst Natl Sci Applicat Lyon
会议录出版者	ELSEVIER SCI LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19206]
专题	清华大学
推荐引用方式 GB/T 7714	Liu, Y.,Liu, S.,Hild, W.,et al. Friction and adhesion in boundary lubrication measured by microtribometers[C]. 见:TRIBOLOGY INTERNATIONAL, 32nd Leeds-Lyon Symposium on Tribiology, Lyon, FRANCE, Web of Science.

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