Ni/nano-TiO2 composite electrodeposits: Textural and structural modifications

Spanou, S; Pavlatou, EA; Spyrellis, N

dc.contributor.author	Spanou, S	en
dc.contributor.author	Pavlatou, EA	en
dc.contributor.author	Spyrellis, N	en
dc.date.accessioned	2014-03-01T01:31:19Z
dc.date.available	2014-03-01T01:31:19Z
dc.date.issued	2009	en
dc.identifier.issn	0013-4686	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19779
dc.subject	Composite coating	en
dc.subject	Nano-particles	en
dc.subject	Nickel electrodeposition	en
dc.subject	Preferred orientation	en
dc.subject	Titania	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Adsorption	en
dc.subject.other	Alumina	en
dc.subject.other	Desorption	en
dc.subject.other	Electrodeposition	en
dc.subject.other	Grain refinement	en
dc.subject.other	Grain size and shape	en
dc.subject.other	Nanoparticles	en
dc.subject.other	Nickel	en
dc.subject.other	Nickel alloys	en
dc.subject.other	Nickel deposits	en
dc.subject.other	Rotating disks	en
dc.subject.other	Titanium dioxide	en
dc.subject.other	Titanium oxides	en
dc.subject.other	Adsorption desorptions	en
dc.subject.other	Applied currents	en
dc.subject.other	Co depositions	en
dc.subject.other	Concentration of	en
dc.subject.other	Crystallographic orientations	en
dc.subject.other	Direct currents	en
dc.subject.other	Electrochemical codeposition	en
dc.subject.other	Experimental conditions	en
dc.subject.other	Grain sizes	en
dc.subject.other	Mean diameters	en
dc.subject.other	Metal surfaces	en
dc.subject.other	Nano-composite coatings	en
dc.subject.other	Nanometer regions	en
dc.subject.other	Nickel electrodeposition	en
dc.subject.other	Nickel matrixes	en
dc.subject.other	Preferred orientation	en
dc.subject.other	Rotating disk electrodes	en
dc.subject.other	Structural modifications	en
dc.subject.other	Textural modifications	en
dc.subject.other	Titania	en
dc.subject.other	Watts type baths	en
dc.subject.other	Composite coatings	en
dc.title	Ni/nano-TiO2 composite electrodeposits: Textural and structural modifications	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.electacta.2008.06.068	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.electacta.2008.06.068	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Nanocomposite coatings were obtained by electrochemical codeposition of TiO2 nano-particles (mean diameter 21 nm) with nickel, from an additive-free Watts type bath. The electrodeposition of Ni-TiO2 composites was carried Out on a rotating disk electrode (RDE), by applying direct current. Pure Ni deposits were also produced under the same experimental conditions for comparison. The surface morphology, the crystallographic orientation of nickel matrix and the grain size of the deposits were investigated, along with the distribution and the percentage, of the embedded nano-particles in nickel matrix, as a function of pH, current density and concentration of TiO2 nano-particles in the bath. The observed textural modifications of composite coatings are associated with specific Structural modifications of Ni crystallites provoked by the adsorption-desorption phenomena occurring oil the metal surface, induced by the presence of TiO2 nano-particles. It has been observed that the presence of TiO2 nano-particles favours the [100] texture of nickel matrix. Moreover, the codeposition of titania nano-particles with nickel was found to be favoured at low pH and low applied Current values. As the titania incorporation percentage is increased, a considerable grain refinement in the nanometer region was revealed followed by an improvement of the quality of the nickel preferred orientation. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Electrochimica Acta	en
dc.identifier.doi	10.1016/j.electacta.2008.06.068	en
dc.identifier.isi	ISI:000264743900023	en
dc.identifier.volume	54	en
dc.identifier.issue	9	en
dc.identifier.spage	2547	en
dc.identifier.epage	2555	en