Wear Characteristics of Carbon-Coated Magnetic Rigid Disks With Well-Defined Surface Texture

[+] Author and Article Information
Hideaki Tanaka, Katsuhiko Shiota, Kenichi Gomi

Hitachi Research Laboratory, Hitachi, Ltd., Hitachi, Ibaraki 319-12, Japan

Yoshihiko Miyake

Odawara Works, Hitachi, Ltd., Odawara, Kanagawa 256, Japan

J. Tribol 115(4), 573-577 (Oct 01, 1993) (5 pages) doi:10.1115/1.2921677 History: Received February 28, 1992; Revised February 01, 1993; Online June 05, 2008


Wear characteristics are described for carbon-coated magnetic rigid disks with well-defined surface textures. Concentric circular hills with uniform height (ca. 80 nm) are produced on a disk surface using a photo-lithography technique, to control the apparent area of contact with a slider. Wear depth on the order of nanometers of the carbon overcoat is evaluated from the decrease in hill height after a drag test. Wear depth increases proportionally with the increase in average contact pressure, which is calculated from the load and apparent area of contact between the disk and slider. Lubricant diminishes wear of the carbon overcoat approximately 50 percent compared with that of an unlubricated overcoat.

Copyright © 1993 by The American Society of Mechanical Engineers
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