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A comparative study on biodegradation and mechanical properties of pressureless infiltrated Ti/Ti6Al4V-Mg composites

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dc.contributor.author Esen, Ziya
dc.contributor.author Bütev, Ezgi
dc.contributor.author Karakaş, Mustafa Serdar
dc.date.accessioned 2020-04-20T10:26:55Z
dc.date.available 2020-04-20T10:26:55Z
dc.date.issued 2016-10
dc.identifier.citation Esen, Ziya; Butev, Ezgi; Karakas, M. Serdar, "A comparative study on biodegradation and mechanical properties of pressureless infiltrated Ti/Ti6Al4V-Mg composites", Journal of the Mechanical Behavior of Biomedical Materials, Vol. 63, pp. 273-283,(2016). tr_TR
dc.identifier.issn 1878-0180
dc.identifier.issn 1751-6161
dc.identifier.uri http://hdl.handle.net/20.500.12416/3386
dc.description.abstract The mechanical response and biodegradation behavior of pressureless Mg-infiltrated Ti-Mg and Ti6Al4V-Mg composites were investigated by compression and simulated body fluid immersion tests, respectively. Prior porous preforms were surrounded uniformly with magnesium as a result of infiltration and the resultant composites were free of secondary phases and intermetallics. Although the composites' compressive strengths were superior compared to bone, both displayed elastic moduli similar to that of cortical bone and had higher ductility with respect to their starting porous forms. However, Ti-Mg composites were unable to preserve their mechanical stabilities during in-vitro tests such that they fractured in multiple locations within 15 days of immersion. The pressure generated by H-2 due to rapid corrosion of magnesium caused failure of the Ti-Mg composites through sintering necks. On the other hand, the galvanic effect seen in Ti6Al4V-Mg was less severe compared to that of Ti-Mg. The degradation rate of magnesium in Ti6Al4V-Mg was slower, and the composites were observed to be mechanically stable and preserved their integrities over the entire 25-day immersion test. Both composites showed bioinert and biodegradable characteristics during immersion tests and magnesium preferentially corroded leaving porosity behind while Ti/Ti6Al4V remained as a permanent scaffold. The porosity created by degradation of magnesium was refilled by new globular agglomerates. Mg(OH)(2) and CaHPO4 phases were encountered during immersion tests while MgCl2 was detected during only the first 5 days. Both composites were classified as bioactive since the precipitation of CaHPO4 phase is known to be precursor of hydroxyapatite formation, an essential requirement for an artificial material to bond to living bone. (C) 2016 Elsevier Ltd. All rights reserved. tr_TR
dc.language.iso eng tr_TR
dc.publisher Elsevier Science BV tr_TR
dc.relation.isversionof 10.1016/j.jmbbm.2016.06.026 tr_TR
dc.rights info:eu-repo/semantics/closedAccess tr_TR
dc.subject Magnesium Composites tr_TR
dc.subject Titanium tr_TR
dc.subject Infiltration tr_TR
dc.subject Mechanical Properties tr_TR
dc.subject Simulated Body Fluid tr_TR
dc.subject Biodegradation tr_TR
dc.title A comparative study on biodegradation and mechanical properties of pressureless infiltrated Ti/Ti6Al4V-Mg composites tr_TR
dc.type article tr_TR
dc.relation.journal Journal of the Mechanical Behavior of Biomedical Materials tr_TR
dc.contributor.authorID 52373 tr_TR
dc.contributor.authorID 47423 tr_TR
dc.identifier.volume 63 tr_TR
dc.identifier.startpage 273 tr_TR
dc.identifier.endpage 286 tr_TR
dc.contributor.department Çankaya Üniversitesi, Fen - Edebiyat Fakültesi, Matematik Bölümü tr_TR


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