Macroscopic Evidence of Thermally Activated Friction with Polytetrafluoroethylene |
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| Authors: | David L. Burris Scott S. Perry W. Gregory Sawyer |
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| Affiliation: | (1) Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611, USA;(2) Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA |
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| Abstract: | ![]()
Under macroscopic pin-on-disk testing the sliding friction coefficient of Polytetrafluoroethylene (PTFE) was investigated over a temperature range of approximately 200–400 K. This study examines the nature of the temperature dependence by testing PTFE pins at varying temperature and humidity on a linear reciprocating pin-on-disk tribometer. The friction coefficient increased monotonically with decreasing temperature from μ = 0.075to μ = 0.210 in a manner consistent with thermal activation; it deviated from this trend only during phase and glass transitions in the PTFE and temperatures below the frost-points for the respective environments. |
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| Keywords: | Cryogenic tribology Polytetrafluoroethylene PTFE Solid lubrication |
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