Synthesis, microstructure and mechanical properties of W-S-C selflubricant thin films deposited by magnetron sputtering

W-S-C thin films were deposited by magnetron sputtering in a semi-industrial deposition unit. Various parameters like the composition, crystallinity, morphology and hardness were studied. A single coating was selected for tribological studies in different testing environments. The tribological response during ambient air testing was governed mainly by carbon-based phase at low normal loads and both carbonbased and WS2 rich tribofilms at higher loads. Very low coefficients of friction (~0.01) were obtained during testing at elevated temperature due to accelerated formation of WS2 rich tribofilms. The tribological response in a vacuum against a steel-based counterbody was unsatisfactory due to the presence of a carbon-phase at the sliding interface. Discrepancies were observed between the tribological response in dry N2 and vacuum environments.

Magnetron sputtering;, Self-lubricant, Transition-metal dichalcogenides;, Tribology

10.1016/j.triboint.2020.106363

0301-679X

1-14

Vuchkov, Todor

606d002d-795b-445f-9e55-0f5cd658cad9

Evaristo, Manuel

99390a0d-29d4-4c5c-be14-7bf35c5b79dc

Bin Yaqub, Talha

e63a18a0-010c-4fef-a40e-67d267ae7fbd

Polcar, Tomas

c669b663-3ba9-4e7b-9f97-8ef5655ac6d2

Cavaleiro, Albano

83fb0417-34af-4c14-b4b4-b9541e4fc652

1 October 2020

Vuchkov, Todor

606d002d-795b-445f-9e55-0f5cd658cad9

Evaristo, Manuel

99390a0d-29d4-4c5c-be14-7bf35c5b79dc

Bin Yaqub, Talha

e63a18a0-010c-4fef-a40e-67d267ae7fbd

Polcar, Tomas

c669b663-3ba9-4e7b-9f97-8ef5655ac6d2

Cavaleiro, Albano

83fb0417-34af-4c14-b4b4-b9541e4fc652

Vuchkov, Todor, Evaristo, Manuel, Bin Yaqub, Talha, Polcar, Tomas and Cavaleiro, Albano (2020) Synthesis, microstructure and mechanical properties of W-S-C selflubricant thin films deposited by magnetron sputtering. Tribology International, 150, 1-14, [106363]. (doi:10.1016/j.triboint.2020.106363).

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Synthesis, microstructure and mechanical properties of W-S-C self-lubricant thin films deposited c - Accepted Manuscript

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Accepted/In Press date: 5 April 2020

e-pub ahead of print date: 11 April 2020

Published date: 1 October 2020

Additional Information: Funding Information: This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 721642 : SOLUTION. Funding Information: The authors would also like to acknowledge the financial support from the projects: ATRITO-0 [co-financed via FEDER (PT2020) POCI-01-0145-FEDER-030446 and FCT (PIDDAC)], On-SURF [co-financed via FEDER (PT2020) POCI-01-0247-FEDER-024521] and CEMMPRE – UID/EMS/00285/2020 [co-financed via FEDER and FCT ( COMPETE )] T.P. acknowledges support from the project Novel nanostructures for engineering applications No. CZ.02.1.01/0.0/0.0/16_026/0008396 and CAAS No. CZ.02.1.01/0.0/0.0/16_019/0000778. Publisher Copyright: © 2020 Elsevier Ltd

Keywords: Magnetron sputtering;, Self-lubricant, Transition-metal dichalcogenides;, Tribology