NDLI: Effects of functional end-groups on nano-tribology characteristics of ultra-thin liquid lubricant films in hard disk drives

Content Provider	IEEE Xplore Digital Library
Author	Tagawa, N. Mori, A.
Copyright Year	1965
Abstract	This paper describes the effects of functional end-groups on lubricant redistribution of ultra-thin liquid lubricant films in hard disk drives. In the experiments, the spreading characteristics of ultra-thin liquid lubricant films have been investigated by using the disks with two kinds of lubricants which have different end-groups. In other words, the tested lubricants were conventional Zdol and novel cyclotriphosphazene-terminated PFPE lubricant. It was found that the mobility of novel lubricant film is lower than that of conventional Zdol and these characteristics depend on the interactions between the end-groups of the lubricants and carbon surfaces. The effect of molecularly thin lubricant films on nano-spacing flying head slider hysteresis behavior for touch-down and take-off process has been studied and the dynamic interactions between the slider and the tested lubricants films in near contact regime have been clarified. In addition, the behavior of two kinds of lubricants films for contact sliders also has been investigated. It could be observed that the lubricant film thickness instability occurs as a result of slider-disk contacts for the tested lubricants. Their unstable lubricant behavior depends on the chemical structure of functional end-group. Therefore, it may be concluded that the functional end-groups play a very important role and affect the tribological performance of lubricants in head-disk interface.
Sponsorship	IEEE Magnetics Society
Starting Page	825
Ending Page	830
Page Count	6
File Size	908360
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lubricants Hard disks Testing Magnetic films Magnetic heads Polymer films Magnetic hysteresis Magnetic recording Chemicals Mechanical engineering slider touch-down and take-off Contact slider de-wetting functional end-group head–disk interface lubricant films nano-triboblogy
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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