Ni/nano-TiO2 composite electrocoatings: Correlation between structural characteristics microhardness and wear resistance

Spanou, S; Pavlatou, EA

dc.contributor.author	Spanou, S	en
dc.contributor.author	Pavlatou, EA	en
dc.date.accessioned	2014-03-01T02:47:25Z
dc.date.available	2014-03-01T02:47:25Z
dc.date.issued	2011	en
dc.identifier.issn	0942-9352	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33139
dc.subject	Electrodeposition	en
dc.subject	Crystalline Orientation	en
dc.subject	Microharness	en
dc.subject	Wear Resistance	en
dc.subject	Grain Size	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	NI-TIO2 NANOCOMPOSITE COATINGS	en
dc.subject.other	MECHANICAL-PROPERTIES	en
dc.subject.other	ELECTROPLATED NICKEL	en
dc.subject.other	ELECTRODEPOSITED NICKEL	en
dc.subject.other	NANOCRYSTALLINE NICKEL	en
dc.subject.other	SIC PARTICLES	en
dc.subject.other	BEHAVIOR	en
dc.subject.other	PULSE	en
dc.subject.other	CORROSION	en
dc.subject.other	NANO	en
dc.title	Ni/nano-TiO2 composite electrocoatings: Correlation between structural characteristics microhardness and wear resistance	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1524/zpch.2011.0052	en
heal.identifier.secondary	http://dx.doi.org/10.1524/zpch.2011.0052	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Nanocomposite coatings were obtained by electrochemical codeposition of TiO2 nano-particles (mean diameter 21 nm, Degussa P25) with nickel, from an additive-free Watts type bath. Pure Ni and composite Ni-TiO2 coatings were electrolytically deposited under both direct and pulse current conditions and an extended region of electrolysis conditions (pH, current density, TiO2 loading in the bath). Pure Ni deposits were produced under the same experimental conditions for comparison. The aim of this study was to correlate the observed structural characteristics of the coatings (crystallographic orientation and grain size of nickel matrix,) and incorporation percentage with the resulting microhardness values and tribological behavior. Overall, the data have demonstrated that when attributing the observed strengthening effect of composites, not only grain refinement and dispersion strengthening mechanisms, but also preferred crystalline orientation should be taken into consideration. The variation of the wear rate is directly associated with the microhardness variations and consequently, governed by the same parameters that determine the synergistic strengthening mechanism proposed. Pure and composite coatings with [110] crystalline orientation exhibited the highest microhardness values and wear resistance. © by Oldenbourg Wissenschaftsverlag, München.	en
heal.publisher	OLDENBOURG VERLAG	en
heal.journalName	Zeitschrift fur Physikalische Chemie	en
dc.identifier.doi	10.1524/zpch.2011.0052	en
dc.identifier.isi	ISI:000289863200004	en
dc.identifier.volume	225	en
dc.identifier.issue	3	en
dc.identifier.spage	313	en
dc.identifier.epage	324	en