Codeposition of ultrafine WC particles in Ni matrix composite electrocoatings

Stroumbouli, M; Gyftou, P; Pavlatou, EA; Spyrellis, N

dc.contributor.author	Stroumbouli, M	en
dc.contributor.author	Gyftou, P	en
dc.contributor.author	Pavlatou, EA	en
dc.contributor.author	Spyrellis, N	en
dc.date.accessioned	2014-03-01T01:22:00Z
dc.date.available	2014-03-01T01:22:00Z
dc.date.issued	2005	en
dc.identifier.issn	0257-8972	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16429
dc.subject	Composite coatings	en
dc.subject	Electroplating	en
dc.subject	Nickel	en
dc.subject	Scanning electron microscopy	en
dc.subject	Tungsten carbide	en
dc.subject	X-ray diffraction	en
dc.subject.classification	Materials Science, Coatings & Films	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Coating techniques	en
dc.subject.other	Composite materials	en
dc.subject.other	Crystal orientation	en
dc.subject.other	Electrodeposition	en
dc.subject.other	Electrodes	en
dc.subject.other	Electrolytic analysis	en
dc.subject.other	Electroplating	en
dc.subject.other	Hydrodynamics	en
dc.subject.other	Morphology	en
dc.subject.other	Rotating disks	en
dc.subject.other	Velocity measurement	en
dc.subject.other	Electrocoatings	en
dc.subject.other	Embedded particles	en
dc.subject.other	Nickel electrocrystallization	en
dc.subject.other	WC particles	en
dc.subject.other	Nickel	en
dc.subject.other	electroplating	en
dc.title	Codeposition of ultrafine WC particles in Ni matrix composite electrocoatings	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.surfcoat.2004.06.034	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.surfcoat.2004.06.034	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	The electrolytic codeposition of ultrafine WC particles (mean diameter of 0.2 mu m) from an additive-free nickel Watts' solution by applying both direct (DC) and pulse (PC) electroplating, has been investigated. Electrodeposition of Ni/WC composites was carried out on a rotating disk electrode (RDE) at various rotation velocities. The effect of type current and hydrodynamic conditions of the plating bath on the codeposition of WC particles with Ni matrix has been reported. The crystallographic orientation of nickel matrix, the distribution and the percentage of the embedded particles, were examined as well as the structure and the surface morphology of the produced composite coatings. It was found that electrodeposits prepared at DC conditions and low rotation velocities are highly porous. On the contrary, when applying PC conditions and high rotation velocities, compact deposits with high concentration of embedded WC particles and uniform distribution were produced. It has been observed that the presence of WC particles in the metal matrix imposes an almost random orientation of Ni crystallites along with a reinforcement of [210] orientation. Taking into consideration a surface complexation model and the experimental data, a mechanism of nickel electrocrystallization in the presence of WC particles has been proposed. (c) 2004 Elsevier B.V All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Surface and Coatings Technology	en
dc.identifier.doi	10.1016/j.surfcoat.2004.06.034	en
dc.identifier.isi	ISI:000228617200027	en
dc.identifier.volume	195	en
dc.identifier.issue	2-3	en
dc.identifier.spage	325	en
dc.identifier.epage	332	en