Microhardness and roughness in nickel electrodeposition under pulse reversed current conditions

Kollia, C; Spyrellis, N

dc.contributor.author	Kollia, C	en
dc.contributor.author	Spyrellis, N	en
dc.date.accessioned	2014-03-01T01:09:27Z
dc.date.available	2014-03-01T01:09:27Z
dc.date.issued	1993	en
dc.identifier.issn	0257-8972	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10997
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0027907771&partnerID=40&md5=eefcdf5160d5c31e8e54d517ab870d01	en
dc.subject.classification	Materials Science, Coatings & Films	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Electrolysis	en
dc.subject.other	Hardness	en
dc.subject.other	Nickel deposits	en
dc.subject.other	Roughness measurement	en
dc.subject.other	Surface properties	en
dc.subject.other	Textures	en
dc.subject.other	Catholyte	en
dc.subject.other	Electrocrystallization	en
dc.subject.other	Microhardness	en
dc.subject.other	Pulse reversed current technique	en
dc.subject.other	Surface morphology	en
dc.subject.other	Vickers method	en
dc.subject.other	Watts type bath	en
dc.subject.other	Electrodeposition	en
dc.title	Microhardness and roughness in nickel electrodeposition under pulse reversed current conditions	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1993	en
heal.abstract	The pulse reversed current (PRC) technique perturbs the electrocrystallization process and as a results changes the surface morphology and the properties of the deposits. The effect of this technique on the electrocrystallization mechanism depends, in addition to the other electrolysis conditions, on two new parameters: the pulse frequency v and the duty cycle [T/(T+T')] × 100, where T is the deposition time (cathodic period) and T' the dissolution time (anodic period). The purpose of this work was to study the changes in the microhardness and the roughness in correlation with the textural modifications, occuring of nickel deposits prepared from an organic-free Watts-type bath, as a function of the PRC parameters. The microhardness of the deposits was determined by the Vickers method and the roughness by the Ra value. It was found that the PRC technique affects the composition of the catholyte with a mechanism analogous to the action of organic additives, by reinforcing the selective adsorption phenomena of the crystal growth, and permits the preparation of smooth and hard nickel electrodeposits in the absence of organic additives. © 1993.	en
heal.publisher	ELSEVIER SCIENCE SA LAUSANNE	en
heal.journalName	Surface and Coatings Technology	en
dc.identifier.isi	ISI:A1993LR33800003	en
dc.identifier.volume	58	en
dc.identifier.issue	2	en
dc.identifier.spage	101	en
dc.identifier.epage	105	en