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In Vitro Bioactivity Investigation of Alkali Treated Ti6al7nb Alloy Foams

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dc.contributor.author Bütev, Ezgi
dc.contributor.author Esen, Ziya
dc.contributor.author Bor, Şakir
dc.date.accessioned 2020-05-03T20:53:56Z
dc.date.available 2020-05-03T20:53:56Z
dc.date.issued 2015-02-01
dc.identifier.citation Butev, Ezgi; Esen, Ziya; Bor, Sakir, "In Vitro Bioactivity Investigation of Alkali Treated Ti6al7nb Alloy Foams", Applied Surface Science, 327, pp. 437-443, (2015). tr_TR
dc.identifier.issn 0169-4332
dc.identifier.issn 1873-5584
dc.identifier.uri http://hdl.handle.net/20.500.12416/3601
dc.description.abstract Biocompatible Ti6Al7Nb alloy foams with 70% porosity manufactured by space holder method were activated via alkali treatment using 5 M NaOH solution at 60 degrees C. The interconnected pore structures enabled formation of homogenous sodium rich coating on the foam surfaces by allowing penetration of alkali solution throughout the pores which had average size of 200 mu m. The resulted coating layer having 500 nm thickness exhibited porous network morphology with 100 nm pore size. On the other hand, heat treatment conducted subsequent to alkali treatment at 600 degrees C in air transformed sodium rich coating into crystalline bioactive sodium titanate phases. Although the coatings obtained by additional heat treatment were mechanically stable and preserved their morphology, oxidation of the samples deteriorated the compressive strength significantly without affecting the elastic modulus. However, heat treated samples revealed better hydroxyapatite formation when soaked in simulated body fluid (SBF) compared to alkali treated foams. On the other hand, untreated surfaces containing bioactive TiO2 layer were observed to comprise of Ca and P rich precipitates only rather than hydroxyapatite within 15 days. The apatite formed on the treated porous surfaces was observed to have flower-like structure with Ca/P ratio around 1.5 close to that of natural bone. (C) 2014 Elsevier B.V. All rights reserved. tr_TR
dc.language.iso eng tr_TR
dc.publisher Elsevier tr_TR
dc.relation.isversionof 10.1016/j.apsusc.2014.12.005 tr_TR
dc.rights info:eu-repo/semantics/closedAccess tr_TR
dc.subject Porous Materials tr_TR
dc.subject Biomaterials tr_TR
dc.subject Alkali Treatment tr_TR
dc.subject Ti6al7nb Alloy Foams tr_TR
dc.subject Apatite tr_TR
dc.subject Simulated Body Fluid tr_TR
dc.title In Vitro Bioactivity Investigation of Alkali Treated Ti6al7nb Alloy Foams tr_TR
dc.type article tr_TR
dc.relation.journal Applied Surface Science tr_TR
dc.contributor.authorID 47423 tr_TR
dc.identifier.volume 327 tr_TR
dc.identifier.startpage 437 tr_TR
dc.identifier.endpage 443 tr_TR
dc.contributor.department Çankaya Üniversitesi, Mühendislik Fakültesi, Malzeme Bilimi ve Mühendisliği Bölümü tr_TR


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