Investigation of second phase concentration effects on tribological and electrical properties of Cu–WS₂ composites
Freschi, Marco; Di Virgilio, Matteo; Haiko, Oskari; Mariani, Marco; Andena, Luca; Lecis, Nora; Kömi, Jukka; Dotelli, Giovanni (2021-11-22)
arco Freschi, Matteo Di Virgilio, Oskari Haiko, Marco Mariani, Luca Andena, Nora Lecis, Jukka Kömi, Giovanni Dotelli, Investigation of second phase concentration effects on tribological and electrical properties of Cu–WS2 composites, Tribology International, Volume 166, 2022, 107357, ISSN 0301-679X, https://doi.org/10.1016/j.triboint.2021.107357
© 2021 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://urn.fi/URN:NBN:fi-fe2021113057922
Tiivistelmä
Abstract
In this preliminary study, a set of self-lubricating copper-tungsten disulfide (Cu-WS₂) composites are prepared via a powder metallurgy route to analyze the effects of solid lubricant concentration on their tribological, electrical and wettability properties. An extensive characterization is performed to preliminarily assess the potential application of these metal matrix composites (MMCs) in sliding electrical contacts working under harsh conditions. The experimental results reveal the beneficial effect of WS₂ on the wear behavior of the prepared composites, as demonstrated by friction coefficient, specific wear rate and wear coefficients results. A second phase content in the 10–15 wt% range appears to guarantee the better combination of the desired features.
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