Friction and Adhesion of Copper in Vacuum

[+] Author and Article Information
R. D. Brown

Southwest Research Institute, San Antonio, Texas

R. A. Burton

Lubrication Research Section, Southwest Research Institute, San Antonio, Texas

J. of Lubrication Tech 89(4), 425-431 (Oct 01, 1967) (7 pages) doi:10.1115/1.3617017 History: Received June 29, 1966; Online July 11, 2011


Friction and adhesion coefficients of copper on copper were measured in vacuum (5 × 10−10 to 4 × 10−7 torr) at temperatures ranging from −270 to 1000 F, and in controlled pressures of dry air ranging from 10−9 to 760 torr at 75 F. The effects of duration of exposure of surfaces to vacuum, and the effects of contact duration on adhesion were studied. Friction coefficients were very high (2.2 to over 16) and increased greatly with temperature; adhesion coefficients also increased with temperature, but at given temperatures, were about one-tenth the magnitudes of the friction coefficient.

Copyright © 1967 by ASME
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