Effective particle dispersion via high-shear mixing of the electrolyte for electroplating a nickel-molybdenum disulphide composite
Effective particle dispersion via high-shear mixing of the electrolyte for electroplating a nickel-molybdenum disulphide composite
The hydrophobic nature of molybdenum disulphide (MoS2) particles is a major challenge for electrodepositing uniform Ni- MoS2 composite coatings due to particle agglomerates present in the aqueous nickel plating bath. In this study, high-shear mixing was shown for the first time as a facile and effective way to achieve a narrow particle-size distribution and stable particle dispersions in the electrolyte, which were characterised by measuring particle-size distributions via dynamic light scattering. The influence of shear mixing duration and speed on particle dispersion in the electrolyte was investigated. The resulting Ni-MoS2 composite coating had a compact structure, showing a lower coefficient of friction and enhanced wear resistance in unlubricated wear tests. In comparison, magnetic stirring was less effective in breaking down particle agglomerates in the bath, which led to a porous and fragile deposit with poor tribological properties.
composite coating, molybdenum disulfide, nickel, electrodeposition, high-shear mixing, tribology
568-577
Zhou, Nan
f9796c96-e7ef-49a8-a07a-757aa042bb76
Wang, Shuncai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
1 September 2018
Zhou, Nan
f9796c96-e7ef-49a8-a07a-757aa042bb76
Wang, Shuncai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Zhou, Nan, Wang, Shuncai and Walsh, Frank
(2018)
Effective particle dispersion via high-shear mixing of the electrolyte for electroplating a nickel-molybdenum disulphide composite.
Electrochimica Acta, 283, .
(doi:10.1016/j.electacta.2018.06.187).
Abstract
The hydrophobic nature of molybdenum disulphide (MoS2) particles is a major challenge for electrodepositing uniform Ni- MoS2 composite coatings due to particle agglomerates present in the aqueous nickel plating bath. In this study, high-shear mixing was shown for the first time as a facile and effective way to achieve a narrow particle-size distribution and stable particle dispersions in the electrolyte, which were characterised by measuring particle-size distributions via dynamic light scattering. The influence of shear mixing duration and speed on particle dispersion in the electrolyte was investigated. The resulting Ni-MoS2 composite coating had a compact structure, showing a lower coefficient of friction and enhanced wear resistance in unlubricated wear tests. In comparison, magnetic stirring was less effective in breaking down particle agglomerates in the bath, which led to a porous and fragile deposit with poor tribological properties.
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Accepted/In Press date: 28 June 2018
e-pub ahead of print date: 30 June 2018
Published date: 1 September 2018
Keywords:
composite coating, molybdenum disulfide, nickel, electrodeposition, high-shear mixing, tribology
Identifiers
Local EPrints ID: 422082
URI: http://eprints.soton.ac.uk/id/eprint/422082
ISSN: 0013-4686
PURE UUID: 3fdbeb64-7a42-407f-8438-9bd7bfe7b714
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Date deposited: 16 Jul 2018 16:30
Last modified: 16 Mar 2024 06:49
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Author:
Nan Zhou
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