Hardening effect induced by incorporation of SiC particles in nickel electrodeposits

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

dc.contributor.author	Pavlatou, EA	en
dc.contributor.author	Stroumbouli, M	en
dc.contributor.author	Gyftou, P	en
dc.contributor.author	Spyrellis, N	en
dc.date.accessioned	2014-03-01T01:24:29Z
dc.date.available	2014-03-01T01:24:29Z
dc.date.issued	2006	en
dc.identifier.issn	0021-891X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17281
dc.subject	Composites	en
dc.subject	Microhardness	en
dc.subject	Nickel electrodeposits	en
dc.subject	Pulse plating	en
dc.subject	Silicon carbide	en
dc.subject	Texture	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Crystal atomic structure	en
dc.subject.other	Crystal structure	en
dc.subject.other	Electrodeposition	en
dc.subject.other	Microhardness	en
dc.subject.other	Nickel	en
dc.subject.other	Hardening effects	en
dc.subject.other	Nickel electrodeposits	en
dc.subject.other	Nickel matrix	en
dc.subject.other	Pulse plating	en
dc.subject.other	Silicon carbide	en
dc.title	Hardening effect induced by incorporation of SiC particles in nickel electrodeposits	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10800-005-9082-y	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10800-005-9082-y	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Pure Ni and nickel matrix composite electrocoatings containing micron- and nano-SiC particles (1 μm and 20 nm respectively) were produced under direct and pulse current conditions from an additive-free Watts type bath. The effect of the particle size, codeposition percentage of SiC and type of imposed current on the microhardness as well as on the microstructure of the electrodeposits were investigated. Ni/SiC composite deposits prepared under either direct or pulse current conditions exhibited a considerable strengthening effect with respect to pure Ni coatings. The improved hardness of composite coatings was associated to specific structural modifications of Ni crystallites provoked by the adsorption of H+ on the surface of SiC particles, thus leading to a (211) texture mode of Ni crystal growth. Pulse electrodeposition significantly improved the hardness of the Ni/SiC composite coatings, especially at low duty cycles, in which grain refinement and higher SiC incorporation (vol. %) was achieved. The enhanced hardness of Ni/nano-SiC deposits, as compared to Ni/micron-SiC composites, was attributed to the increasing values of the number density of embedded SiC particles in the nickel matrix with decreasing particle size. In addition, the observed hardening effects of the SiC particles might be associated to the different embedding mechanisms of the particles, which could be characterized as inter-crystalline for micron-SiC and partially intra-crystalline for nano-SiC particles. © Springer 2005.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Applied Electrochemistry	en
dc.identifier.doi	10.1007/s10800-005-9082-y	en
dc.identifier.isi	ISI:000235116000001	en
dc.identifier.volume	36	en
dc.identifier.issue	4	en
dc.identifier.spage	385	en
dc.identifier.epage	394	en