Investigation of the microhardness and the electrical resistivity of undercooled Ni-10 at.% Si alloys

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dc.contributor.authorCadirli, Emin
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2011
dc.departmentNiğde ÖHÜ
dc.description.abstractNi-10 at.% Si alloys (Ni and Si of purity of 99.99%) were prepared by arc melting method under argon atmosphere in a water-cooled copper hearth with a non-consumable tungsten electrode and titanium getter. Spherical-shaped Ni-10 at.% Si alloy melts are undercooled in a containerless electromagnetic levitation apparatus. The effects of undercooling (Delta T) on the microstructure, electrical resistivity (rho) and microhardness (HV) were investigated. The experimental results reveal that with the increase of the undercooling of the melts from 16 to 110 K, the microstructures undergo transition from coarse dendritic morphology to ultra fine dendritic morphology. The measurements of microhardness of the samples were performed by using a microhardness test device. The dependence of microhardness on undercooling was analyzed and it has been found that with increasing the undercooling the HV increases. Variations of electrical resistivity of the Ni10 at.% Si alloy with the temperature in the range of 300-800 K were also determined by using a standard d.c. four-point probe technique. The resistivity of samples increases with increasing temperature and undercooling. (C) 2010 Elsevier By. All rights reserved.
dc.description.sponsorshipScientific and Technical Research Council of Turkey (TUBITAK) [2219]
dc.description.sponsorshipThis research was supported financially by the Scientific and Technical Research Council of Turkey (TUBITAK) under 2219 postdoctoral research fellowship program. The author thanks Professor Dieter M. Herlach and Dr. Evgeny Davydov, for their continuous support and laboratory facilities.
dc.identifier.doi10.1016/j.jnoncrysol.2010.11.104
dc.identifier.endpage813
dc.identifier.issn0022-3093
dc.identifier.issn1873-4812
dc.identifier.issue3
dc.identifier.scopus2-s2.0-79251596858
dc.identifier.scopusqualityQ2
dc.identifier.startpage809
dc.identifier.urihttps://dx.doi.org/10.1016/j.jnoncrysol.2010.11.104
dc.identifier.urihttps://hdl.handle.net/11480/4751
dc.identifier.volume357
dc.identifier.wosWOS:000288232500004
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorCadirli, Emin
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofJOURNAL OF NON-CRYSTALLINE SOLIDS
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectUndercooling
dc.subjectMicrostructure
dc.subjectMicrohardness
dc.subjectElectrical resistivity
dc.titleInvestigation of the microhardness and the electrical resistivity of undercooled Ni-10 at.% Si alloys
dc.typeArticle

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