High Temperature Tribological Properties of Polybenzimidazole (PBI)

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Title: High Temperature Tribological Properties of Polybenzimidazole (PBI)
Authors: Jean-Fulcrand, A
Masen, M
Bremner, T
Wong, J
Item Type: Journal Article
Abstract: Polybenzimidazole (PBI) is a high performance polymer that can potentially replace metal components in some high temperature conditions where lubrication is challenging or impossible. Yet most characterisations so far have been conducted at relatively low temperatures. In this work, the tribological properties of PBI were examined with a steel ball-PBI disc contact at 280 °C under high load and high sliding speed conditions. The dry friction coefficient is relatively low and decreases modestly with increasing applied load. Surface analysis shows that PBI transfer layers are responsible for the low friction observed. In-situ contact temperature measurements were performed to provide for the first time direct links between the morphology and distribution of the transfer layer, and the temperature distribution in the contact. The results show that high pressure and high temperature in heavily loaded contacts promote the removal and the subsequent regeneration of a transfer layer, resulting in a very thin transfer layer on the steel counterface. FeOOH is formed in the contact at high loads, instead of Fe2O3. This may affect the adhesion between PBI and the counterface and thus influence the transfer layer formation process. To control PBI wear, contact temperature management will be crucial.
Issue Date: 14-Sep-2017
Date of Acceptance: 11-Sep-2017
URI: http://hdl.handle.net/10044/1/50761
DOI: https://dx.doi.org/10.1016/j.polymer.2017.09.026
ISSN: 0032-3861
Publisher: Elsevier
Start Page: 159
End Page: 168
Journal / Book Title: Polymer
Volume: 128
Copyright Statement: © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keywords: 03 Chemical Sciences
09 Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Mechanical Engineering

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