Temperature-Dependent Friction and Wear Behavior of PTFE and MoS2
Abstract
We present an investigation of the temperature-dependent friction behavior of PTFE, MoS2, and PTFE-on- MoS2. Friction behavior was measured while continuously varying contact temperature in the range -150 to 175°C while sliding in dry nitrogen, as well as for self-mated PTFE immersed in liquid nitrogen. These results contrast with previous reports of monotonic inverse temperature dependent friction behavior, as well as reported high-friction transitions and plateaus at temperatures below about -20°C that were not observed, providing new insights about the molecular mechanisms of macro-scale friction. The temperature-dependent friction behavior characteristic of self-mated PTFE was found also on the PTFE-on-MoS2 sliding contact, suggesting that PTFE friction was defined by sub-surface deformation mechanisms and internal friction even when sliding against a lamellar lubricant with extremely low friction coefficient (μ ~ 0.02). The various relaxation temperatures of PTFE were found in the temperature-dependent friction behavior, showing excellent agreement with reported values acquired using torsional techniques measuring internal friction. Additionally, hysteresis in friction behavior suggests an increase in near-surface crystallinity at upon exceeding the high temperature relaxation, Tα~ 116°C.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Materials Science and Engineering Center
- Univ. of Florida, Gainesville, FL (United States). Dept. of Mechanical and Aerospace Engineering
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1285954
- Report Number(s):
- SAND2016-7052J
Journal ID: ISSN 1023-8883; PII: 702
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Tribology Letters
- Additional Journal Information:
- Journal Volume: 63; Journal Issue: 2; Journal ID: ISSN 1023-8883
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Cryogenic; Temperature; disulfide; MoS2; Solid lubrication; Friction; Friction mechanisms; Wear; PTFE; Molybdenum
Citation Formats
Babuska, T. F., Pitenis, A. A., Jones, M. R., Nation, B. L., Sawyer, W. G., and Argibay, N. Temperature-Dependent Friction and Wear Behavior of PTFE and MoS2. United States: N. p., 2016.
Web. doi:10.1007/s11249-016-0702-y.
Babuska, T. F., Pitenis, A. A., Jones, M. R., Nation, B. L., Sawyer, W. G., & Argibay, N. Temperature-Dependent Friction and Wear Behavior of PTFE and MoS2. United States. https://doi.org/10.1007/s11249-016-0702-y
Babuska, T. F., Pitenis, A. A., Jones, M. R., Nation, B. L., Sawyer, W. G., and Argibay, N. Thu .
"Temperature-Dependent Friction and Wear Behavior of PTFE and MoS2". United States. https://doi.org/10.1007/s11249-016-0702-y. https://www.osti.gov/servlets/purl/1285954.
@article{osti_1285954,
title = {Temperature-Dependent Friction and Wear Behavior of PTFE and MoS2},
author = {Babuska, T. F. and Pitenis, A. A. and Jones, M. R. and Nation, B. L. and Sawyer, W. G. and Argibay, N.},
abstractNote = {We present an investigation of the temperature-dependent friction behavior of PTFE, MoS2, and PTFE-on- MoS2. Friction behavior was measured while continuously varying contact temperature in the range -150 to 175°C while sliding in dry nitrogen, as well as for self-mated PTFE immersed in liquid nitrogen. These results contrast with previous reports of monotonic inverse temperature dependent friction behavior, as well as reported high-friction transitions and plateaus at temperatures below about -20°C that were not observed, providing new insights about the molecular mechanisms of macro-scale friction. The temperature-dependent friction behavior characteristic of self-mated PTFE was found also on the PTFE-on-MoS2 sliding contact, suggesting that PTFE friction was defined by sub-surface deformation mechanisms and internal friction even when sliding against a lamellar lubricant with extremely low friction coefficient (μ ~ 0.02). The various relaxation temperatures of PTFE were found in the temperature-dependent friction behavior, showing excellent agreement with reported values acquired using torsional techniques measuring internal friction. Additionally, hysteresis in friction behavior suggests an increase in near-surface crystallinity at upon exceeding the high temperature relaxation, Tα~ 116°C.},
doi = {10.1007/s11249-016-0702-y},
journal = {Tribology Letters},
number = 2,
volume = 63,
place = {United States},
year = {Thu Jun 16 00:00:00 EDT 2016},
month = {Thu Jun 16 00:00:00 EDT 2016}
}
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