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Electro co-deposition of Ni-Al2O3 composite coatings

Electro co-deposition of Ni-Al2O3 composite coatings
Electro co-deposition of Ni-Al2O3 composite coatings
Nickel–Al2O3 composite coatings have been successfully deposited galvanostatically on to stainless steel substrates by electro co-deposition from a Watts bath containing between 50 and 150 g/l of sub-micron or nano- sized alumina particles applying current density of ?10, ?20 and ?32 mA cm?2. The alumina distribution in the composite films on the two sides of the substrate was remarkably different due to solution hydrodynamics and electric field effects. The effect of current density, particle concentration in the bath and particle size are studied systematically producing a comprehensive set of data for better understanding the effects of these variables on the amount of particles co-deposited. The amount of Al2O3 co-deposited in the films increases with the particle concentration in the bath and strongly depends on the current density and on particle size. The effect of the current density and of the alumina inclusions on the crystallinity of the Ni matrix and on the Ni crystallites grain size has also been studied. The inclusions of nano or sub-micron-Al2O3 particles are found to strongly influence the metallic nickel microstructure.
0022-2461
5361-5373
Corni, Ilaria
f3279082-7093-4a67-b1d7-9ab8bac75b8b
Chater, Richard J.
6fbccae4-90e2-4146-9ef7-ba0173b29b5a
Boccaccini, Aldo R.
847415b9-fdd9-41c0-acb7-3806e53fcabd
Ryan, Mary P.
254bed6a-2f41-4e5e-ae37-3e3884c01190
Corni, Ilaria
f3279082-7093-4a67-b1d7-9ab8bac75b8b
Chater, Richard J.
6fbccae4-90e2-4146-9ef7-ba0173b29b5a
Boccaccini, Aldo R.
847415b9-fdd9-41c0-acb7-3806e53fcabd
Ryan, Mary P.
254bed6a-2f41-4e5e-ae37-3e3884c01190

Corni, Ilaria, Chater, Richard J., Boccaccini, Aldo R. and Ryan, Mary P. (2012) Electro co-deposition of Ni-Al2O3 composite coatings. Journal of Materials Science, 47 (14), 5361-5373. (doi:10.1007/s10853-012-6381-7).

Record type: Article

Abstract

Nickel–Al2O3 composite coatings have been successfully deposited galvanostatically on to stainless steel substrates by electro co-deposition from a Watts bath containing between 50 and 150 g/l of sub-micron or nano- sized alumina particles applying current density of ?10, ?20 and ?32 mA cm?2. The alumina distribution in the composite films on the two sides of the substrate was remarkably different due to solution hydrodynamics and electric field effects. The effect of current density, particle concentration in the bath and particle size are studied systematically producing a comprehensive set of data for better understanding the effects of these variables on the amount of particles co-deposited. The amount of Al2O3 co-deposited in the films increases with the particle concentration in the bath and strongly depends on the current density and on particle size. The effect of the current density and of the alumina inclusions on the crystallinity of the Ni matrix and on the Ni crystallites grain size has also been studied. The inclusions of nano or sub-micron-Al2O3 particles are found to strongly influence the metallic nickel microstructure.

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Published date: July 2012
Organisations: Engineering Science Unit

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Local EPrints ID: 346961
URI: http://eprints.soton.ac.uk/id/eprint/346961
ISSN: 0022-2461
PURE UUID: 05aab7d4-4828-4da0-861b-0e8801c86a6b

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Date deposited: 28 Jan 2013 11:56
Last modified: 14 Mar 2024 12:43

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Contributors

Author: Ilaria Corni
Author: Richard J. Chater
Author: Aldo R. Boccaccini
Author: Mary P. Ryan

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