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In vacuo tribological behavior of polytetrafluoroethylene (ptfe) and alumina nanocomposites: The importance of water for ultralow wear
University of Florida, USA.ORCID iD: 0000-0002-2473-9171
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2014 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 53, no 1, p. 189-197Article in journal (Refereed) Published
Abstract [en]

Polytetrafluoroethylene (PTFE) is widely regarded as an excellent candidate for solid lubrication in vacuum. However, it is often precluded from many practical applications due to its intrinsically high wear rate. Over the past decade, it has been discovered that small loading fractions of alumina nanofillers can increase the wear resistance of PTFE by three to four orders of magnitude. This dramatic increase in wear resistance has in turn prompted numerous tribological studies to examine the robustness of this performance. In this study, the wear and friction behavior of unfilled PTFE and PTFE and alumina nanocomposites were evaluated under a broad range of vacuum environments from 760 to 4 9 10-6 Torr. The nanocomposites of PTFE/alumina showed a dramatic increase in wear of over two orders of magnitude at the highest vacuum conditions. There appears to be an optimal vacuum environment around 1-10 Torr, in which these samples achieved the lowest wear rates of approximately 2.5 9 10-7 mm3/(Nm)

Place, publisher, year, edition, pages
2014. Vol. 53, no 1, p. 189-197
Keywords [en]
Alumina, Friction, Nanocomposite, Polytetrafluoroethylene, Tribochemistry, Vacuum, Wear, Orders of magnitude, Polytetrafluoroethylene (PTFE), Solid lubrication, Tribo-chemistry, Tribological behaviors, Vacuum condition, Vacuum environment, Wear and friction, Nanocomposites, Polytetrafluoroethylenes, Tribology, Wear of materials, Wear resistance, Loading
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:ri:diva-56344DOI: 10.1007/s11249-013-0256-1Scopus ID: 2-s2.0-84892923762OAI: oai:DiVA.org:ri-56344DiVA, id: diva2:1591261
Available from: 2021-09-06 Created: 2021-09-06 Last updated: 2023-05-23Bibliographically approved

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Harris, Kathryn L

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