NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Friction at small displacement.Low contact resistance between metal surfaces is often observed in spite of interposed lubricant and/or oxide films. To study this effect an apparatus is used with which normal force and tangential microdisplacement are applied between a small lead rider and a gold flat with various surface film conditions. Under nonoxidized and nonlubricated conditions, and with either oxide or stearic acid lubricant film alone, friction is high and contact resistance is low. With oxide and lubricant together, friction is much lower and slide is smooth, but contact resistance remains low and Ohm's law is obeyed. The results are consistent with Greenwood's theory of contact resistance for a cluster of minute metallic contact spots within the load-supporting area. The contact resistance of such a cluster is indistinguishable, for practical purposes, from that given by complete metallic contact.
Document ID
19730029562
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Campbell, W. E.
(Rensselaer Polytechnic Institute, Troy, N.Y., United States)
Aronstein, J.
(IBM East Fishkill Facility Hopewell Junction, N.Y., United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1972
Subject Category
Machine Elements And Processes
Report/Patent Number
ASLE PREPRINT 72LC-6B-1
Meeting Information
Meeting: International Lubrication Conference
Location: New York, NY
Country: US
Start Date: October 9, 1972
End Date: October 12, 1972
Sponsors: American Society of Lubrication Engineers, American Society of Mechanical Engineers
Accession Number
73A14364
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available