Evaristo, Manuel, Polcar, Tomas and Cavaleiro, Albano
Can W-Se-C coatings be competitive to W-S-C ones?
Plasma Processes and Polymers, 6, (S1), . (doi:10.1002/ppap.200930414).
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WSeC coatings were deposited by co-sputtering from WSe2 and C targets. Carbon content varied from 25 up to 70?at.%, Se/W ratio was between 0.9 and 1.0, with no significant influence of the carbon content on their variations. The hardness of the coatings was evaluated by nano-indentation with values between 3.8 and 5.6?GPa. The structure of the coatings analysed by X-ray diffraction in glancing mode could be defined as quasi-amorphous. The tribological properties were evaluated in an SRV machine using reciprocating ball-on-disk tests under increasing loads. In general, the friction gets decreased with increasing loads. The comparison with other transition metals, dichalcogenides alloyed with carbon, namely MoSeC and WSC systems, showed that WSeC coatings could be a good alternative with almost identical friction properties.
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