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Work-hardening of Ferrite Head Surfaces by Wear with Flexible Recording Media

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1 Author(s)
Polleys, R.W. ; IBM General Products Division, P.O. Box 13190, Tucson, Arizona 85732, USA

The ferrite surfaces of rotating magnetic heads were found to have been work-hardened to different degrees depending upon the abrasiveness of the flexible recording media used. For the more abrasive tape, the work-hardening was less than for the less abrasive tape. Associated with the increase in microhardness was decreased signal read-back and increased incidence of surface “pull-outs.” These phenomena may be understood in the context of fracture mechanics where residual stress, resulting from plastic deformation of the ferrite, is predominant in the wear mechanism.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:22 ,  Issue: 6 )