Graphene as a lubricant on Ag for electrical contact applications
2015 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 50, no 19, 6518-6525 p.Article in journal (Refereed) Published
The potential of graphene as a solid lubricant in sliding Ag-based electrical contacts has been investigated. Graphene was easily and quickly deposited by evaporating a few droplets of a commercial graphene solution in air. The addition of graphene reduced the friction coefficient in an Ag/Ag contact with a factor of similar to 10. The lubricating effect was maintained for more than 150,000 cycles in a pin-on-disk test at 1 N. A reduction in friction coefficient was also observed with other counter surfaces such as steel and W but the life time was strongly dependent on the materials combination. Ag/Ag contacts exhibited a significantly longer life time than steel/Ag and W/Ag contacts. The trend was explained by an increased affinity for metal-carbon bond formation.
Place, publisher, year, edition, pages
2015. Vol. 50, no 19, 6518-6525 p.
IdentifiersURN: urn:nbn:se:uu:diva-260595DOI: 10.1007/s10853-015-9212-9ISI: 000358149600028OAI: oai:DiVA.org:uu-260595DiVA: diva2:848554
FunderKnut and Alice Wallenberg FoundationSwedish Foundation for Strategic Research