A New Method of Testing the Surface Finish of a Metal

[+] Author and Article Information
B. C. Panda

Department of Physics, Regional Engineering College, Rourkela, Orissa, India

J. Eng. Ind 90(2), 404-406 (May 01, 1968) (3 pages) doi:10.1115/1.3604648 History: Received June 29, 1967; Online August 25, 2011


A sensitive method of testing the surface finish of a metal has been suggested based on the principle of field emission. The quasi-classical calculation of the field-emission current from a plane metal surface shows that the calculated current is always less than the experimental current. The discrepancy between these theoretical and experimental currents has been shown to be a measure of the nonplanarity of the metal surface from which one can get information about how much finish a particular metal surface can take.

Copyright © 1968 by ASME
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