The University of Southampton
University of Southampton Institutional Repository

Mechanisms of friction and wear reduction by h-BN nanosheet and spherical W nanoparticle additives to base oil: Experimental study and molecular dynamics simulation

Mechanisms of friction and wear reduction by h-BN nanosheet and spherical W nanoparticle additives to base oil: Experimental study and molecular dynamics simulation
Mechanisms of friction and wear reduction by h-BN nanosheet and spherical W nanoparticle additives to base oil: Experimental study and molecular dynamics simulation

Hexagonal boron nitride (h-BN) nanosheets, spherical W nanoparticles, and their combinations were utilized as lubricant additives to synthetic PAO6 oil. The addition of W NPs led to a decrease in the coefficient of friction and wear rate. Molecular dynamics (MD) simulations and in situ TEM mechanical tests showed that the positive effect of adding spherical W NPs can be attributed to their rolling and sliding in the tribological contact zone. Adding BN nanosheets to PAO6 also improved the tribological performance of friction pairs: MD simulations suggest that the exfoliation and sliding of BN layers under tribological contact can contribute to the reduction of friction and wear. Moreover, a synergistic effect from the simultaneous addition of W and BN nanoparticles was observed: the CoF and wear reached minimum values among all tested suspensions. The formation of W/BN core/shell structures by wrapping of W nanoparticles by h-BN sheets provided superior macroscale lubricity.

In situ TEM, Lubricated friction, MD simulations, Nanoparticles
0301-679X
Bondarev, A. V.
013f7328-8e72-4cf4-b369-bcaa8d5a1648
Fraile, A.
a5360fc0-5002-4410-85fc-d0af55e36b8a
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Shtansky, D. V.
b0aebbbb-2613-47f3-a825-b811454f634e
Bondarev, A. V.
013f7328-8e72-4cf4-b369-bcaa8d5a1648
Fraile, A.
a5360fc0-5002-4410-85fc-d0af55e36b8a
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Shtansky, D. V.
b0aebbbb-2613-47f3-a825-b811454f634e

Bondarev, A. V., Fraile, A., Polcar, T. and Shtansky, D. V. (2020) Mechanisms of friction and wear reduction by h-BN nanosheet and spherical W nanoparticle additives to base oil: Experimental study and molecular dynamics simulation. Tribology International, 151, [106493]. (doi:10.1016/j.triboint.2020.106493).

Record type: Article

Abstract

Hexagonal boron nitride (h-BN) nanosheets, spherical W nanoparticles, and their combinations were utilized as lubricant additives to synthetic PAO6 oil. The addition of W NPs led to a decrease in the coefficient of friction and wear rate. Molecular dynamics (MD) simulations and in situ TEM mechanical tests showed that the positive effect of adding spherical W NPs can be attributed to their rolling and sliding in the tribological contact zone. Adding BN nanosheets to PAO6 also improved the tribological performance of friction pairs: MD simulations suggest that the exfoliation and sliding of BN layers under tribological contact can contribute to the reduction of friction and wear. Moreover, a synergistic effect from the simultaneous addition of W and BN nanoparticles was observed: the CoF and wear reached minimum values among all tested suspensions. The formation of W/BN core/shell structures by wrapping of W nanoparticles by h-BN sheets provided superior macroscale lubricity.

This record has no associated files available for download.

More information

Published date: November 2020
Additional Information: Funding Information: This work was supported by the project OP VVV Novel nanostructures for engineering applications No. CZ.02.1.01/0.0/0.0/16_026/0008396 . MD simulations were carried out in Anselm & Salomon supercomputers, IT4I, Ostrava, Czech Republic, and supported by The Ministry of Education, Youth and Sports from the Large Infrastructures for Research, Experimental Development and Innovations project “IT4Innovations National Supercomputing Center - LM2015070”. D.V.S thanks the Ministry of Education and Science of the Russian Federation (Increase Competitiveness Program of NUST “ MISIS ” no. K2-2020-004 ). Also A.V.B. acknowledges CzechNanoLab Research Infrastructure supported by MEYS CR ( LM2018110 ). Publisher Copyright: © 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
Keywords: In situ TEM, Lubricated friction, MD simulations, Nanoparticles

Identifiers

Local EPrints ID: 453993
URI: http://eprints.soton.ac.uk/id/eprint/453993
ISSN: 0301-679X
PURE UUID: 08b59822-0ed4-4bd7-8c57-0447fa2a92e8
ORCID for T. Polcar: ORCID iD orcid.org/0000-0002-0863-6287

Catalogue record

Date deposited: 27 Jan 2022 18:09
Last modified: 25 Jun 2022 01:44

Export record

Altmetrics

Contributors

Author: A. V. Bondarev
Author: A. Fraile
Author: T. Polcar ORCID iD
Author: D. V. Shtansky

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×