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Tribological Behaviour of PVD Coatings Lubricated with a FAP Anion-Based Ionic Liquid Used as an Additive

Department of Construction and Manufacturing Engineering, University of Oviedo, Campus de Viesques, 33203 Gijón, Asturias, Spain
Department of Design and Engineering, Bournemouth University, Poole, BH12 5BB, UK
Department of Physical and Analytical Chemistry, University of Oviedo, C/Julián Clavería, n° 8, 33006 Oviedo, Asturias, Spain
Author to whom correspondence should be addressed.
Academic Editors: Antolin Hernández Battez and Rubén González Rodríguez
Lubricants 2016, 4(1), 8;
Received: 9 February 2016 / Revised: 9 March 2016 / Accepted: 11 March 2016 / Published: 17 March 2016
(This article belongs to the Special Issue Nanoparticles and Ionic Liquids in Lubrication)
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This paper studies 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl) trifluorophosphate ionic liquid ([BMP][FAP]) as a 1 wt% additive to a polyalphaolefin (PAO 6) in the lubrication of CrN and TiN PVD coatings. Friction and wear behaviour were determined by using a ball-on-plate reciprocating tribometer at two loads (20 and 40 N) and a reciprocating frequency of 10 Hz. The tribological behaviour of this mixture has also been compared to a traditional oil additive, like zinc dialkyldithiophosphate (ZDDP). As an additive, ionic liquid exhibited an important friction and wear reduction compared to the base oil. However, tests conducted with ZDDP show slightly better results. XPS was used to analyse wear surfaces. The interactions of each additive with the surface contributed to improving the tribological behaviour of the lubricants. View Full-Text
Keywords: lubricant additives; PVD coatings; ionic liquids; friction coefficient lubricant additives; PVD coatings; ionic liquids; friction coefficient

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Viesca, J.-L.; Anand, M.; Blanco, D.; Fernández-González, A.; García, A.; Hadfield, M. Tribological Behaviour of PVD Coatings Lubricated with a FAP Anion-Based Ionic Liquid Used as an Additive. Lubricants 2016, 4, 8.

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