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Erschienen in: Tribology Letters 2/2007

01.11.2007 | Original Paper

Changes in Friction Properties of Monolayer Lubricant Films Induced by Development of Molecules’ Bonding

verfasst von: H. Zhang, Y. Mitsuya, Y. Fujikawa, A. Fuwa, Y. He, K. Fukuzawa

Erschienen in: Tribology Letters | Ausgabe 2/2007

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Abstract

Functional perfluoropolyether (PFPE) films consisting of mobile and bonded molecules are widely used for lubrication of magnetic disks. In order to clarify the influence of film composition (mobile/bonded) on tribological performance, we measured the friction properties of two types of 2 nm-thick PFPE films (functional Zdol2000 and nonfunctional Z03) under lightly loaded (loading force: 0–1 mN) and quasi-static (low rotational speed: 2.1 mm/s) conditions as a function of elapsed time. The friction force of Z03 remained unchanged with time and increased linearly with loading force as described by Amontons’ law. In contrast, induced by the development of the molecules’ bonding in time, the friction force of Zdol2000 increased and transited to a nonlinear increase with loading force as time proceeded. The nonlinear friction-load relationship of Zdol2000 in the equilibrium state was characterized by the Johnson-Kendall-Roberts model.

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Metadaten
Titel
Changes in Friction Properties of Monolayer Lubricant Films Induced by Development of Molecules’ Bonding
verfasst von
H. Zhang
Y. Mitsuya
Y. Fujikawa
A. Fuwa
Y. He
K. Fukuzawa
Publikationsdatum
01.11.2007
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 2/2007
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-007-9261-6

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