Nanotribological investigation of sliding properties of transition metal dichalcogenide thin film coatings
Nanotribological investigation of sliding properties of transition metal dichalcogenide thin film coatings
Transition metal dichalcogenide (TMD)-based coatings are known for their low friction performance, which is attributed to the formation of a tribolayer consisting almost exclusively of pure well-ordered TMD. However, the formation of such a tribolayer and its wear track coverage is still unknown. In this study, we employed surface mapping and nanotribological techniques to study the properties of the wear tracks of composite W-S-C coatings. Our analysis revealed that the as-deposited coating consisted of two phases, with significantly different nanoscale frictional properties. We attributed the phases to nanocrystalline WS2 (low friction) and amorphous solution of carbon and WS2 (high friction). The two phases wear at different rates, especially at lower loads, where we observed faster depletion of nanocrystalline WS2. In the wear track, sparse flat WS2 flakes were identified, suggesting that the recrystallization of the WS2 phase occurs only at the spots where the contact pressure is the highest.
Rapuc, Ales
8c0b0e98-87b4-4040-9ea4-6bbb155cdd9c
Simonovic, Kosta
c5ae0e3f-5617-41f3-a2bd-bd218ec14e78
Huminiuc, Teodor
b743b7ba-7541-4f2e-b4be-ea25b088e4c6
Cavaleiro, Albano
83fb0417-34af-4c14-b4b4-b9541e4fc652
Polcar, Tomas
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Rapuc, Ales
8c0b0e98-87b4-4040-9ea4-6bbb155cdd9c
Simonovic, Kosta
c5ae0e3f-5617-41f3-a2bd-bd218ec14e78
Huminiuc, Teodor
b743b7ba-7541-4f2e-b4be-ea25b088e4c6
Cavaleiro, Albano
83fb0417-34af-4c14-b4b4-b9541e4fc652
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Rapuc, Ales, Simonovic, Kosta, Huminiuc, Teodor, Cavaleiro, Albano and Polcar, Tomas
(2020)
Nanotribological investigation of sliding properties of transition metal dichalcogenide thin film coatings.
ACS Applied Materials and Interfaces.
Abstract
Transition metal dichalcogenide (TMD)-based coatings are known for their low friction performance, which is attributed to the formation of a tribolayer consisting almost exclusively of pure well-ordered TMD. However, the formation of such a tribolayer and its wear track coverage is still unknown. In this study, we employed surface mapping and nanotribological techniques to study the properties of the wear tracks of composite W-S-C coatings. Our analysis revealed that the as-deposited coating consisted of two phases, with significantly different nanoscale frictional properties. We attributed the phases to nanocrystalline WS2 (low friction) and amorphous solution of carbon and WS2 (high friction). The two phases wear at different rates, especially at lower loads, where we observed faster depletion of nanocrystalline WS2. In the wear track, sparse flat WS2 flakes were identified, suggesting that the recrystallization of the WS2 phase occurs only at the spots where the contact pressure is the highest.
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Accepted/In Press date: 4 November 2020
e-pub ahead of print date: 17 November 2020
Identifiers
Local EPrints ID: 445231
URI: http://eprints.soton.ac.uk/id/eprint/445231
ISSN: 1944-8244
PURE UUID: e16758b6-96a4-4b9b-bfa1-3f654a378730
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Date deposited: 25 Nov 2020 17:33
Last modified: 17 Mar 2024 06:06
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Contributors
Author:
Ales Rapuc
Author:
Kosta Simonovic
Author:
Teodor Huminiuc
Author:
Albano Cavaleiro
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