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Synthesis and structural properties of Mo–Se–C sputtered coatings

Synthesis and structural properties of Mo–Se–C sputtered coatings
Synthesis and structural properties of Mo–Se–C sputtered coatings
Transition metal dichalcogenides have attracted considerable attention due to their self-lubricant properties. Their drawbacks, such us low load-bearing capacity or environmental sensitivity, have been partially overcome by alloying or doping with metals, carbon, or nitrides. Nevertheless, there is still a considerable potential for further improvement, since the majority of studies has been aimed at MoS2 and WS2 based coatings and the properties of diselenides remain almost unknown.

Mo–Se–C coatings were prepared by non-reactive r.f. magnetron sputtering from carbon target with embedded MoSe2 pellets. The carbon content and Se/Mo ratio determined by electron probe microanalysis increased from 29 to 68 at.% and from 1.7 to 2.0, respectively, as a function of the decreasing number of pellets. The coating structure analyzed by X-ray diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy showed that Mo–Se–C was a mixture of amorphous carbon and Mo–Se phases, since no traces of molybdenum carbides were observed. Linear increase of the hardness from 0.7 (29 at.% C) to 4.1 GPa (68 at.% C) showed a significant improvement compared to values typical for pure MoSe2 coating
MoSe2, self-lubrication, carbon based coating
0257-8972
2418-2422
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Evaristo, M.
ad10848a-2415-413e-b5f9-ed28d055ef60
Stueber, M.
a46e3533-943b-46c6-af42-0ebd02b48358
Cavaleiro, A.
114e42eb-7255-47ef-834d-0546d56d3171
Polcar, T.
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Evaristo, M.
ad10848a-2415-413e-b5f9-ed28d055ef60
Stueber, M.
a46e3533-943b-46c6-af42-0ebd02b48358
Cavaleiro, A.
114e42eb-7255-47ef-834d-0546d56d3171

Polcar, T., Evaristo, M., Stueber, M. and Cavaleiro, A. (2008) Synthesis and structural properties of Mo–Se–C sputtered coatings. Surface and Coatings Technology, 202 (11), 2418-2422. (doi:10.1016/j.surfcoat.2007.08.019).

Record type: Article

Abstract

Transition metal dichalcogenides have attracted considerable attention due to their self-lubricant properties. Their drawbacks, such us low load-bearing capacity or environmental sensitivity, have been partially overcome by alloying or doping with metals, carbon, or nitrides. Nevertheless, there is still a considerable potential for further improvement, since the majority of studies has been aimed at MoS2 and WS2 based coatings and the properties of diselenides remain almost unknown.

Mo–Se–C coatings were prepared by non-reactive r.f. magnetron sputtering from carbon target with embedded MoSe2 pellets. The carbon content and Se/Mo ratio determined by electron probe microanalysis increased from 29 to 68 at.% and from 1.7 to 2.0, respectively, as a function of the decreasing number of pellets. The coating structure analyzed by X-ray diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy showed that Mo–Se–C was a mixture of amorphous carbon and Mo–Se phases, since no traces of molybdenum carbides were observed. Linear increase of the hardness from 0.7 (29 at.% C) to 4.1 GPa (68 at.% C) showed a significant improvement compared to values typical for pure MoSe2 coating

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More information

e-pub ahead of print date: 23 August 2007
Published date: 25 February 2008
Keywords: MoSe2, self-lubrication, carbon based coating
Organisations: nCATS Group

Identifiers

Local EPrints ID: 199785
URI: http://eprints.soton.ac.uk/id/eprint/199785
ISSN: 0257-8972
PURE UUID: 80b15b51-081e-4fea-8aab-f662353509a5
ORCID for T. Polcar: ORCID iD orcid.org/0000-0002-0863-6287

Catalogue record

Date deposited: 20 Oct 2011 13:32
Last modified: 15 Mar 2024 03:40

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Contributors

Author: T. Polcar ORCID iD
Author: M. Evaristo
Author: M. Stueber
Author: A. Cavaleiro

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