Comparison of Grinding and Lapping of Ferrites and Metals

[+] Author and Article Information
S. Chandrasekar, M. C. Shaw

Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287

B. Bhushan

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

J. Eng. Ind 109(2), 76-82 (May 01, 1987) (7 pages) doi:10.1115/1.3187111 History: Received May 19, 1986; Online July 30, 2009


Mechanical finishing of ferrite materials used in magnetic storage systems are found to have a shallow magnetically inactive layer due to residual elastic stress in the surface. The residual stresses in ground and lapped Ni-Zn surfaces are measured and compared with comparable values for steel. Whereas the residual stress in a diamond ground ferrite surface is of predominantly mechanical origin (compressive) that in a conventionally ground steel surface is predominantly of thermal origin (tensile). Methods of reducing the residual stress in a lapped ferrite surface are discussed.

Copyright © 1987 by ASME
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