Effects of Zr content on microstructure and corrosion resistance of Ti-30Nb-Zr casting alloys for biomedical applications

dc.creatorMartins, DQ
dc.creatorOsorio, WR
dc.creatorSouza, MEP
dc.creatorCaram, R
dc.creatorGarcia, A
dc.date2008
dc.dateFEB 15
dc.date2014-11-17T07:58:40Z
dc.date2015-11-26T17:13:49Z
dc.date2014-11-17T07:58:40Z
dc.date2015-11-26T17:13:49Z
dc.date.accessioned2018-03-29T00:02:10Z
dc.date.available2018-03-29T00:02:10Z
dc.identifierElectrochimica Acta. Pergamon-elsevier Science Ltd, v. 53, n. 6, n. 2809, n. 2817, 2008.
dc.identifier0013-4686
dc.identifierWOS:000253213600019
dc.identifier10.1016/j.electacta.2007.10.060
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/79894
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/79894
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/79894
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1281662
dc.descriptionTitanium alloys show attractive properties for biomedical applications where the most important factors are biocompatibility, corrosion resistance, low modulus of elasticity, very good strength-to-weight ratio, reasonable formability and osseointegration. The aim of this study was to investigate the effects of Zr content (7.5 and 15 wt%) on microstructure and corrosion resistance of Ti-30Nb-Zr as-cast alloy samples. The corrosion tests were carried out in a 0.9% NaCl (0.15 mol L-1) solution at 25 degrees C and neutral pH range. A horizontal centrifuged solidification set-up was used to obtain as-cast samples with a fine dendritic arrangement. In order to evaluate the corrosion behavior, electrochemical impedance spectroscopy (EIS), polarization curves and an equivalent circuit analysis were used. It was found that the as-cast microstructure tends to have the dendrite arm spacings reduced with increasing Zr content. The results have shown that the addition of Zr to a Ti-30Nb alloy has been efficient to stabilize the beta phase. The resulting impedance parameters and passive current densities have shown that the Ti-30Nb alloys sample without Zr addition presents a higher surface reactivity which can induce a better osseointegration than those containing Zr. (c) 2007 Elsevier Ltd. All rights reserved.
dc.description53
dc.description6
dc.description2809
dc.description2817
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationElectrochimica Acta
dc.relationElectrochim. Acta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectTi-Nb alloys
dc.subjectcentrifugal casting
dc.subjectEIS
dc.subjectbone ingrowth
dc.subjectosseointegration
dc.subjectTi-nb Alloys
dc.subjectElectrochemical Impedance Spectroscopy
dc.subjectMechanical-properties
dc.subjectTitanium-alloy
dc.subjectOrthopedic Implants
dc.subjectTi-6al-4v Alloy
dc.subjectBehavior
dc.subjectAl
dc.subjectSi
dc.subjectTransformation
dc.titleEffects of Zr content on microstructure and corrosion resistance of Ti-30Nb-Zr casting alloys for biomedical applications
dc.typeArtículos de revistas


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