Transparent Pin Wear Test on Thin-Film Magnetic Disk

[+] Author and Article Information
Youichi Kawakubo

Mechanical Engineering Research Laboratory, Hitachi, Ltd., Tsuchiura, Ibaraki, 300 Japan

Yotsuo Yahisa

Data Storage and Retrieval Systems Division, Hitachi, Ltd., Odawara, Kanagawa, 256 Japan

J. Tribol 117(2), 297-301 (Apr 01, 1995) (5 pages) doi:10.1115/1.2831246 History: Received February 21, 1994; Revised July 11, 1994; Online January 24, 2008


Pin-on-disk wear tests on thin-film magnetic disks were performed using transparent materials. Quartz glass (QG), transparent zirconia (TZ), sapphire (SA), and synthesized diamond (DI) were used as pin materials. In addition to friction, sliding condition and pin wear were continuously monitored with video camera. Simultaneous friction measurement and video monitoring showed that friction dropped when wear debris intruded between pin and disk surfaces. Pin wear, from the measured diameter of wear scar on spherical pins, increased in the order of DI, SA, QG, and TZ. This order of pin wear does not coincide with that of the pin bulk hardness. Disk lifetime increased in the order of TZ, QG, SA, and DI, and the smaller the pin wear, the longer the disk lifetime.

Copyright © 1995 by The American Society of Mechanical Engineers
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