Wang, Zhongnan, Chetwynd, D. G. and Mao, Ken (2018) Friction characteristics of polymers applicable to small-scale devices. Tribology International, 119 . pp. 698-706. doi:10.1016/j.triboint.2017.11.036 ISSN 0301-679X.

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Abstract

A review of the critical features of a published micro-tribometer design, which was intended to improve on the dynamic response of typical commercial instruments, leads to its use with a modified technique. Data post-processing is introduced to partially compensate for some potential systematic errors. This approach is demonstrated by a preliminary study of the coefficient of friction (CoF) in sub-mm length reciprocating sliding motion for samples of polytetrafluoroethylene (PTFE) and an R11 acrylic formulation made by micro-stereo-lithography, with an SiO2-coated silicon wafer used as a control sample. Testing covered normal loads in the region of 10 mN–60 mN, at scan frequencies up to 9 Hz, corresponding to sliding speeds in the broad region of 1 mm s−1. While the control samples closely adhered to Amonton's laws over all the test parameter ranges, the CoFs of the two polymers showed contrasting patterns of dependence on sliding speed and repetition rate. Such results have implications for how polymers might be used effectively in future designs for small mechanical systems. They indicate a clear need for further development of the testing methods and large-scale studies of tribological behaviour and its underlying mechanisms under the specified micro-scale conditions.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH):	Polymers, Microelectromechanical systems
Journal or Publication Title:	Tribology International
Publisher:	Elsevier Science Ltd.
ISSN:	0301-679X
Official Date:	March 2018
Dates:	Date Event March 2018 Published 5 December 2017 Available 21 November 2017 Accepted 9 August 2017 Submitted
Volume:	119
Page Range:	pp. 698-706
DOI:	10.1016/j.triboint.2017.11.036
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	20 December 2017
Date of first compliant Open Access:	5 December 2018

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