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Particulate Magnetic Disk With Improved Wear Resistance

IP.com Disclosure Number: IPCOM000063645D
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18

Publishing Venue

IBM

Related People

Authors:
Elsner, G Hinkel, H Steiner, W [+details]

Abstract

Platelets are dispersed in a polymer-based magnetic coating for reinforcement and improved wear resistance. Standard particulate magnetic disk coatings contain substantially spherical Al2O3 particles as a reinforcement to improve the durability of the magnetic head slider when it contacts the disk. Nevertheless, the durability of magnetic disks is a critical factor that is difficult to control. Insufficient Al2O3 particle adhesion to the polymer binder leads to the generation of debris and failure. Platelets of Al2O3 or other hard materials, such as SiC, Si3N4 or TiC, are proposed as alternatives to the spherical Al2O3 particles used for reinforcement.