Bierbaum scratch hardness test

Bierbaum scratch hardness test

[′bir‚bau̇m ¦skrach ′härd·nəs ‚test]
(engineering)
A test for the hardness of a solid sample by microscopic measurement of the width of scratch made by a diamond point under preset pressure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.