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Interaction Between Selected MoS2 Nanoparticles and ZDDP Tribofilms
Institute of Applied Physics, Vienna University of Technology, AC²T research GmbH - Austrian Center of Competence for Tribology, Viktor-Kaplan-Straße 2 D, 2700 Wiener Neustadt.
AC²T research GmbH - Austrian Center of Competence for Tribology, Viktor-Kaplan-Straße 2 D, 2700 Wiener Neustadt.
AC²T research GmbH - Austrian Center of Competence for Tribology, Viktor-Kaplan-Straße 2 D, 2700 Wiener Neustadt.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
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2015 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 59, no 1, article id 26Article in journal (Refereed) Published
Abstract [en]

Nanoparticles based on transition metal dichalcogenides (TMD) are considered to hold great promise as boundary lubricating additive/material for improving friction and wear of engineering functional surfaces. However, TMD nanoparticles cannot provide a comprehensive surface protection against oxidation, corrosion or sludge control. Therefore, the current lubricant developments may still have to depend on conventional additives such as zinc dialkyl dithiophosphate (ZDDP), and it is essential to understand the interaction of nanoparticles with such additives in order to explore how these nanoparticles could be commercially employed in fully formulated lubricants. This paper examines the tribological properties of three different nanoparticles: inorganic fullerene-like MoS2, rhenium-doped MoS2 and MoS2 nanotubes in steel and steel with preformed ZDDP tribofilm surfaces using a pin-on-disc-type tribometer under reciprocating sliding conditions. The resulting tribofilms have been evaluated using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, transmission electron microscopy and atomic force microscopy. The results show that although the nanoparticles are able to reduce friction in all cases, the resulting tribofilm composition and morphology, and their lubricating mechanisms are significantly different. The MoS2 nanoparticles and nanotubes show good synergism with ZDDP, and tribofilms formed from nanoparticles exhibit improved friction and wear properties compared to that typically formed from ZDDP.

Place, publisher, year, edition, pages
2015. Vol. 59, no 1, article id 26
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-6019DOI: 10.1007/s11249-015-0552-zISI: 000356539000026Scopus ID: 2-s2.0-84935885468Local ID: 43665f85-8e76-4848-bde6-90c6d14d0bbaOAI: oai:DiVA.org:ltu-6019DiVA, id: diva2:978895
Note
Validerad; 2015; Nivå 2; 20150625 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Suarez, Aldara Naveira

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