Correlation Between Contact Start/Stop and Constant Speed Drag Testing in Magnetic Head-Disk Tribology

[+] Author and Article Information
S. K. Ganapathi, F. E. Talke

Center for Magnetic Recording Research, University of California, San Diego, LaJolla, CA 92093-0401

J. Tribol 115(3), 387-391 (Jul 01, 1993) (5 pages) doi:10.1115/1.2921648 History: Received February 14, 1992; Revised October 01, 1992; Online June 05, 2008


A model to establish the correlation between wear in constant speed drag testing and contact start/stop testing is developed. The model is based on the Archard wear equation and uses the quasi-steady Kita-Kogure-Mitsuya model for the transition of a slider from sliding to flying to calculate the velocity dependent contact force between the slider and disk during start/stop. Experimental results for the wear of a zirconia overcoated disk are obtained for both start/stop and constant speed drag testing as a function of the number of repeated cycles using optical profilometry. The correlation between predictions and experimental data shows good agreement for up to at least 10,000 cycles of sliding.

Copyright © 1993 by The American Society of Mechanical Engineers
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