Magnetic Head-Media Interface Temperatures: Part 2—Application to Magnetic Tapes

[+] Author and Article Information
B. Bhushan

IBM Almaden Research Center, San Jose, CA 95120-6099

J. Tribol 109(2), 252-256 (Apr 01, 1987) (5 pages) doi:10.1115/1.3261347 History: Received February 01, 1986; Online October 29, 2009


An analytical model has been used to predict the interface temperature of a typical magnetic head-tape contact and of isolated (exposed) magnetic particles in contact with the head. Average and maximum interface temperatures for the assumed head-tape interface are about 7° and 10° C, respectively. If the exposed magnetic particles contact the head surface, the average and maximum temperture rises could be about 600° and 900° C, respectively. The duration of an asperity contact is about 2 to 4 μs and the thermal gradients perpendicular to the sliding surface are very large (a temperature drop of 90 percent in a depth of less than the radius of an asperity contact or a few micrometers). The predicted temperatures are compared with the temperatures previously measured using an infrared radiometric technique.

Copyright © 1987 by ASME
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