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Evolution of damage in MoS2-based dry film lubricants (DFLs) in fretting wear – the effect of DFL thickness and contact geometry

Barman, K.; Shipway, P.H.; Voisey, K.T.; Pattinson, G.

Authors

K. Barman

G. Pattinson



Abstract

Dry film lubricant (DFL) coatings are widely used to reduce coefficients of friction and damage in highly loaded contacts. This work investigates the behaviour of a commercially available MoS2-based DFL in a cylinder-on-flat contact geometry with a fretting amplitude of 300 µm. Cylinders with radii of 15 mm, 80 mm and 160 mm along with DFL thicknesses between 12 µm and 86 µm were utilized. Three stages in the lifetime of the system were investigated; in the first stage, the DFL wore with a volumetric rate that was proportional to the number of cycles (under a given load), until the thickness of the DFL was reached. In the second stage, a thin low friction surface layer existed, with its durability being proportional to the contact pressure. In the third stage, metal-metal contact resulted in short-term instabilities in the coefficient of friction and the DFL system was said to have failed.

Journal Article Type Article
Publication Date Apr 1, 2017
Journal Progress in Organic Coatings
Print ISSN 0300-9440
Electronic ISSN 0300-9440
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 105
APA6 Citation Barman, K., Shipway, P., Voisey, K., & Pattinson, G. (2017). Evolution of damage in MoS2-based dry film lubricants (DFLs) in fretting wear – the effect of DFL thickness and contact geometry. Progress in Organic Coatings, 105, https://doi.org/10.1016/j.porgcoat.2016.12.022
DOI https://doi.org/10.1016/j.porgcoat.2016.12.022
Keywords fretting, coefficient of friction, wear, molybdenum disulfide, molybdenum disulphide, MoS2, titanium alloy, Ti-6Al-4V
Publisher URL http://www.sciencedirect.com/science/article/pii/S0300944016309535
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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