Electroless Ni-P composites with ZrO2: Preparation, characterization, thermal treatment

Novakovic, J; Delagrammatikas, M; Vassiliou, P; Dervos, CT

dc.contributor.author	Novakovic, J	en
dc.contributor.author	Delagrammatikas, M	en
dc.contributor.author	Vassiliou, P	en
dc.contributor.author	Dervos, CT	en
dc.date.accessioned	2014-03-01T02:46:46Z
dc.date.available	2014-03-01T02:46:46Z
dc.date.issued	2010	en
dc.identifier.issn	10120386	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32843
dc.subject	Composite	en
dc.subject	Corrosion resistance	en
dc.subject	Electroless Ni-P	en
dc.subject	Vacuum thermal treatment	en
dc.subject	ZrO2	en
dc.subject.other	Bath load	en
dc.subject.other	Electroless co-deposition	en
dc.subject.other	Electroless Ni-P	en
dc.subject.other	Electroless Ni-P coating	en
dc.subject.other	Linear polarization	en
dc.subject.other	Metal substrate	en
dc.subject.other	Thermal treatment	en
dc.subject.other	Vacuum heat treatment	en
dc.subject.other	Vickers microhardness	en
dc.subject.other	Wear and corrosion resistance	en
dc.subject.other	Corrosion resistance	en
dc.subject.other	Deposits	en
dc.subject.other	Heat treatment	en
dc.subject.other	Microhardness	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Sodium chloride	en
dc.subject.other	Suspensions (fluids)	en
dc.subject.other	Vacuum	en
dc.subject.other	Wear resistance	en
dc.subject.other	X ray diffraction	en
dc.subject.other	Zirconia	en
dc.subject.other	Zirconium	en
dc.subject.other	Zirconium alloys	en
dc.subject.other	Composite coatings	en
dc.title	Electroless Ni-P composites with ZrO2: Preparation, characterization, thermal treatment	en
heal.type	conferenceItem	en
heal.identifier.primary	10.4028/www.scientific.net/DDF.297-301.899	en
heal.identifier.secondary	http://dx.doi.org/10.4028/www.scientific.net/DDF.297-301.899	en
heal.publicationDate	2010	en
heal.abstract	The study of composite electroless Ni-P coatings is pursued in order to obtain coatings on a metal substrate with advanced properties i.e. with high wear and corrosion resistance for particular engineering uses. Composite NiP-ZrO2 layers were prepared by simultaneous electroless codeposition of Ni-P and ZrO2 on steel, from a reducing solution in which ZrO2 particles were kept in suspension by stirring. The particles load in the bath was 0, 0.5, 1.0, 2.0 and 5.0 g/l. The deposits of 30 μm in thickness, were characterized for structure, morphology and hardness by scanning electron microscopy and microanalysis as well as X-ray diffraction. It was found that the maximum ZrO2 particle incorporation attained was 7-10% of Zr. Vickers microhardness was measured for the plain deposit and found to be 720 HV and for the maximum zirconia content of 10%, 820 HV. After a vacuum heat treatment for 10 min, the microhardness of the composite is found to be 1500 HV. The electrochemical linear polarization measurements in a corrosive NaCl 3.5% solution shows at 2.0 g/l bath load favourable conditions for the formation of a defects free composite deposit could be created. © (2010) Trans Tech Publications.	en
heal.journalName	Defect and Diffusion Forum	en
dc.identifier.doi	10.4028/www.scientific.net/DDF.297-301.899	en
dc.identifier.volume	297-301	en
dc.identifier.spage	899	en
dc.identifier.epage	905	en