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Tribochemistry and thermo-oxidative stability of halogen-free ionic liquids
AC2T research GmbH, Viktor-Kaplan-Strasse 2/C, 2700 Wiener Neustadt, Austria .
AC2T research GmbH, Viktor-Kaplan-Strasse 2/C, 2700 Wiener Neustadt, Austria .
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0002-8972-2944
2017 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 7, no 77, 48766-48776 p.Article in journal (Refereed) Published
Abstract [en]

Heat generation by friction during machine operation causes thermo-oxidative degradation and evaporation of lubricants which in turn generates volatiles. Therefore, having an excellent thermo-oxidative stability is one of the desired prerequisites for the applicability of lubricants in tribological systems. This study reports new insights regarding the thermo-oxidative stability of halogen-free room-temperature ionic liquids (RTILs) as well as fundamental changes in the tribofilm's composition that have a positive impact on their tribological performance at elevated temperatures. In this context, the formation of binary iron phosphates/phosphides based tribofilms from a phosphonium phosphate-based RTIL has been reported for the first time. This RTIL significantly enhances both thermo-oxidative stability and tribological performance of alkylborane–imidazole complexes. A beneficial effect between this RTIL and a conventional friction modifier led to enhanced anti-wear properties supported by the presence of iron phosphide/phosphate tribofilms on the disc surfaces, as detected by XPS.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2017. Vol. 7, no 77, 48766-48776 p.
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-66226DOI: 10.1039/C7RA09163JISI: 000413777800026Scopus ID: 2-s2.0-85032631506OAI: oai:DiVA.org:ltu-66226DiVA: diva2:1151495
Note

Validerad;2017;Nivå 2;2017-11-09 (andbra)

Available from: 2017-10-23 Created: 2017-10-23 Last updated: 2017-11-29Bibliographically approved

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