Pulse electrodeposition of Ni/nano-TiO2 composites: Effect of pulse frequency on deposits properties

Spanou, S; Pavlatou, EA

dc.contributor.author	Spanou, S	en
dc.contributor.author	Pavlatou, EA	en
dc.date.accessioned	2014-03-01T01:34:22Z
dc.date.available	2014-03-01T01:34:22Z
dc.date.issued	2010	en
dc.identifier.issn	0021-891X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20715
dc.subject	Crystalline size	en
dc.subject	Electrodeposition	en
dc.subject	Microhardness	en
dc.subject	Ni/nano-TiO2 composites	en
dc.subject	Pulse frequency	en
dc.subject	Texture	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Applied current	en
dc.subject.other	Codeposition	en
dc.subject.other	Crystalline orientations	en
dc.subject.other	Crystalline size	en
dc.subject.other	DC conditions	en
dc.subject.other	Dispersion strengthening	en
dc.subject.other	Effect of pulse	en
dc.subject.other	Grain size	en
dc.subject.other	Incorporation rates	en
dc.subject.other	Nano-TiO	en
dc.subject.other	Nickel matrix	en
dc.subject.other	Preferred orientations	en
dc.subject.other	Pulse currents	en
dc.subject.other	Pulse electrodeposition	en
dc.subject.other	Pulse frequencies	en
dc.subject.other	Strengthening effect	en
dc.subject.other	TiO	en
dc.subject.other	Crystalline materials	en
dc.subject.other	Deposits	en
dc.subject.other	Electrodeposition	en
dc.subject.other	Grain refinement	en
dc.subject.other	Grain size and shape	en
dc.subject.other	Microhardness	en
dc.subject.other	Strengthening (metal)	en
dc.subject.other	Textures	en
dc.subject.other	Nickel deposits	en
dc.title	Pulse electrodeposition of Ni/nano-TiO2 composites: Effect of pulse frequency on deposits properties	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10800-010-0080-3	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10800-010-0080-3	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Pure and composite nickel deposits containing nano-TiO2 particles (dm = 21 nm) were produced under direct-DC and pulse current-PC conditions. The influence of pulse frequency on the codeposition of TiO2 particles, preferred orientation of Ni crystallites and grain size, as well as microhardness of the composites, was investigated systematically. Composites prepared in PC regime displayed higher incorporation percentage than those obtained under DC conditions, and the highest incorporation rates were achieved at pulse frequencies ν >100 Hz. The application of pulse frequency accompanied by the embedding of TiO2 nanoparticles in the nickel matrix resulted in a strong influence upon the crystalline orientation, the grain size and the corresponding microhardness. All composites exhibited higher microhardness values compared to the pure deposits, independent of the applied current conditions. Overall, when ascribing the observed strengthening effect of composites, not only grain refinement and dispersion strengthening mechanisms but also preferred crystalline orientation should be taken into consideration. © Springer Science+Business Media B.V. 2010.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Applied Electrochemistry	en
dc.identifier.doi	10.1007/s10800-010-0080-3	en
dc.identifier.isi	ISI:000277958400005	en
dc.identifier.volume	40	en
dc.identifier.issue	7	en
dc.identifier.spage	1325	en
dc.identifier.epage	1336	en