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Nanotribological Investigation of Sliding Properties of Transition Metal Dichalcogenide Thin Film Coatings.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2020 Dec 02; Vol. 12 (48), pp. 54191-54202. Date of Electronic Publication: 2020 Nov 17. - Publication Year :
- 2020
-
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 WS <subscript>2</subscript> (low friction) and amorphous solution of carbon and WS <subscript>2</subscript> (high friction). The two phases wear at different rates, especially at lower loads, where we observed faster depletion of nanocrystalline WS <subscript>2</subscript> . In the wear track, sparse flat WS <subscript>2</subscript> flakes were identified, suggesting that the recrystallization of the WS <subscript>2</subscript> phase occurs only at the spots where the contact pressure is the highest.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Volume :
- 12
- Issue :
- 48
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 33201658
- Full Text :
- https://doi.org/10.1021/acsami.0c16789