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Synthesis of functionally graded bioactive glass-apatite multistructures on Ti substrates by pulsed laser deposition

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2007
Authors
Tanasković, Dušanka
Jokić, Bojan
Socol, Gabriel
Popescu, A. C.
Mihailescu, Ion N.
Petrović, Rada
Janaćković, Đorđe
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Abstract
Functionally graded glass-apatite multistructures were synthesized by pulsed laser deposition on Ti substrates. We used sintered targets of hydroxyapatite Ca-10(PO4)(6)(OH)(2), or bioglasses in the system SiO2-Na2O-K2O-CaO-MgO-P2O5 with SiO2 content of either 57 wt.% (6P57) or 61 wt.% (061). A UV KrF* (lambda = 248 nm, tau gt 7 ns) excimer laser source was used for the multipulse laser ablation of the targets. The hydroxyapatite thin films were obtained in H2O Vapors, while the bioglass layers were deposited in O-2. Thin films of 6P61 were deposited in direct contact with Ti, because Ti and this glass have similar thermal expansion behaviors, which ensure good bioglass adhesion to the substrate. This glass, however, is not bioactive, so yet more depositions of 6P57 bioglass and/or hydroxyapatite thin films were performed. All structures with hydroxyapatite overcoating were post-treated in a flux of water vapors. The obtained multistructures were characterized by various techniques. X...ray investigations of the coatings found small amounts of crystalline hydroxyapatite in the outer layers. The scanning electron microscopy analyses revealed homogeneous coatings with good adhesion to the Ti substrate. Our studies showed that the multistructures we had obtained were compatible with further use in biomimetic metallic implants with glass-apatite coating applications.

Keywords:
biomimetic metallic implants / bioglasses / bioactive thin layers / pulsed laser deposition
Source:
Applied Surface Science, 2007, 254, 4, 1279-1282
Publisher:
  • Elsevier Science Bv, Amsterdam
Funding / projects:
  • info:eu-repo/grantAgreement/MESTD/MPN2006-2010/142070/RS// (RS-142070)

DOI: 10.1016/j.apsusc.2007.08.009

ISSN: 0169-4332

WoS: 000252299500100

Scopus: 2-s2.0-36348943087
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URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1149
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  • Radovi istraživača / Researchers’ publications (TMF)
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Tehnološko-metalurški fakultet

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