WS2 nanoparticles - potential replacement for ZDDP and friction modifier additives
WS2 nanoparticles - potential replacement for ZDDP and friction modifier additives
In high-pressure, high-temperature sliding contacts, WS2 nanoadditives react with the metal substrate to generate 100+ nm chemical tribofilms with a layered structure and excellent tribological properties. The friction, wear and micromechanical properties of WS2 tribofilms are compared with those of tribofilms formed by the zinc dialkyldithiophosphate (ZDDP) antiwear additive and ZDDP-organic friction modifier (OFM) mixture. Nanoindentation measurements showed that WS2 generates tribofilms with higher values of hardness and Young’s modulus than ZDDP and ZDDP+OFM, which explains its excellent antiwear properties. The friction performance of WS2 surpassed that of ZDDP+OFM. The striking reduction of boundary friction is credited to the layered structure of the WS2 tribofilm, with exfoliated /squashed WS2 nanoparticles that fill the gaps and cover the reacted tribofilm. In view of these results, WS2 proves to be a suitable candidate for the replacement of problematic lubricant additives currently in use
Ratoi, Monica
cfeffe10-31ca-4630-8399-232c4bc2beff
Niste, Vlad
dc4260f3-a934-47e5-b612-da50e0e985da
Zekonyte, Jurgita
c40df725-5ce3-4692-b638-bbb4d847b5ea
21 January 2014
Ratoi, Monica
cfeffe10-31ca-4630-8399-232c4bc2beff
Niste, Vlad
dc4260f3-a934-47e5-b612-da50e0e985da
Zekonyte, Jurgita
c40df725-5ce3-4692-b638-bbb4d847b5ea
Ratoi, Monica, Niste, Vlad and Zekonyte, Jurgita
(2014)
WS2 nanoparticles - potential replacement for ZDDP and friction modifier additives.
19th International Colloquium Tribology: Industrial and Automotive Lubrication, Stuttgart, Germany.
21 - 23 Jan 2014.
9 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
In high-pressure, high-temperature sliding contacts, WS2 nanoadditives react with the metal substrate to generate 100+ nm chemical tribofilms with a layered structure and excellent tribological properties. The friction, wear and micromechanical properties of WS2 tribofilms are compared with those of tribofilms formed by the zinc dialkyldithiophosphate (ZDDP) antiwear additive and ZDDP-organic friction modifier (OFM) mixture. Nanoindentation measurements showed that WS2 generates tribofilms with higher values of hardness and Young’s modulus than ZDDP and ZDDP+OFM, which explains its excellent antiwear properties. The friction performance of WS2 surpassed that of ZDDP+OFM. The striking reduction of boundary friction is credited to the layered structure of the WS2 tribofilm, with exfoliated /squashed WS2 nanoparticles that fill the gaps and cover the reacted tribofilm. In view of these results, WS2 proves to be a suitable candidate for the replacement of problematic lubricant additives currently in use
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Published date: 21 January 2014
Venue - Dates:
19th International Colloquium Tribology: Industrial and Automotive Lubrication, Stuttgart, Germany, 2014-01-21 - 2014-01-23
Organisations:
nCATS Group
Identifiers
Local EPrints ID: 360362
URI: http://eprints.soton.ac.uk/id/eprint/360362
PURE UUID: f09f9173-63e2-4f97-9d79-6d0c78b4b5ea
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Date deposited: 06 Dec 2013 14:45
Last modified: 18 Mar 2024 03:14
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Contributors
Author:
Vlad Niste
Author:
Jurgita Zekonyte
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