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Synthesis and properties of W–Se–C coatings deposited by PVD in reactive and non-reactive processes

Evaristo, Manuel, Polcar, Tomas and Cavaleiro, Albano (2009) Synthesis and properties of W–Se–C coatings deposited by PVD in reactive and non-reactive processes Vacuum, 83, (10), pp. 1262-1265. (doi:10.1016/j.vacuum.2009.03.030).

Record type: Article

Abstract

Transition metal dichalcogenides (TMD) are well known for their self lubricant properties, due to unique crystal structure, with low hardness which makes them inappropriate in applications requiring high load bearing capacity. Nevertheless, there is still a considerable potential for further improvements since other TMDs such as diselenides remain almost unknown. The WSeC coatings were deposited by either co-sputtering from WSe2 and C targets or by working in reactive mode in an Ar + CH4 atmosphere. Carbon content varied from 25 at.% up to 70 at.%, Se/W ratio of co-sputtered coatings was between 0.9 and 1.0, with no significant influence of the carbon content on their variations, while in the reactive process it reached values higher than 1.7. The hardness of the coatings was evaluated by nanoindentation, with values between 1.6 and 5.6 GPa. The structure of the coatings was analysed by X-ray diffraction in glancing mode, showing that the coatings have a quasi-amorphous structure. Finally, the selected samples were tested on pin-on-disc showing low friction properties of WSeC co-sputtered coatings.

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Published date: 2009
Organisations: nCATS Group

Identifiers

Local EPrints ID: 199819
URI: http://eprints.soton.ac.uk/id/eprint/199819
ISSN: 0042-207X
PURE UUID: a2d5ad4b-7ddf-47f5-81cb-e22c2afa648b
ORCID for Tomas Polcar: ORCID iD orcid.org/0000-0002-0863-6287

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Date deposited: 20 Oct 2011 10:53
Last modified: 18 Jul 2017 11:15

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Contributors

Author: Manuel Evaristo
Author: Tomas Polcar ORCID iD
Author: Albano Cavaleiro

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