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Hydroxyapatite/titania sol-gel coatings on titanium-zirconium alloy for biomedical applications

Wen, Cui`e, Xu, W., Hu, W. and Hodgson, Peter 2007, Hydroxyapatite/titania sol-gel coatings on titanium-zirconium alloy for biomedical applications, Acta biomaterialia, vol. 3, pp. 403-410, doi: 10.1016/j.actbio.2006.10.004.

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Title Hydroxyapatite/titania sol-gel coatings on titanium-zirconium alloy for biomedical applications
Author(s) Wen, Cui`e
Xu, W.
Hu, W.
Hodgson, Peter
Journal name Acta biomaterialia
Volume number 3
Start page 403
End page 410
Publisher Elsevier
Place of publication Amsterdam, Netherlands
Publication date 2007-05
ISSN 1742-7061
1878-7568
Keyword(s) TiZr alloy
sol–gel processing
hydroxyapatite
titania
HA/TiO2 coatings
Summary A simple sol–gel method was developed for hydroxyapatite/titania (HA/TiO2) coatings on non-toxic titanium–zirconium (TiZr) alloy for biomedical applications. The HA/TiO2-coated TiZr alloy displayed excellent bioactivity when soaked in a simulated body fluid (SBF) for an appropriate period. Differential scanning calorimetry, thermogravimetric analysis, X-ray diffraction and scanning electron microscopy-energy dispersive spectrometry were used to characterize the phase transformations and the surface structures and to assess the in vitro tests. The HA/TiO2 layers were spin-coated on the surface of TiZr alloy at a speed of 3000 rpm for 15 s, followed by a heat treatment at 600 °C for 20 min in an argon atmosphere sequentially. The TiO2 layer exhibited a cracked surface and an anatase structure and the HA layer displayed a uniform dense structure. Both the TiO2 and HA layers were 25 μm thick, and the total thickness of the HA/TiO2 coatings was 50 μm. The TiZr alloy after the above HA/TiO2 coatings displayed excellent bone-like apatite-forming ability when soaked in SBF and can be anticipated to be a promising load-bearing implant material.
Notes Available online 3 January 2007
Language eng
DOI 10.1016/j.actbio.2006.10.004
Field of Research 090301 Biomaterials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006, Acta Materialia Inc.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007135

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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