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

Paper ID Volume ID Publish Year Pages File Format Full-Text
2245 105 2007 8 PDF Available
Title
Hydroxyapatite/titania sol–gel coatings on titanium–zirconium alloy for biomedical applications ☆
Abstract

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.

Keywords
TiZr alloy; Sol–gel processing; Hydroxyapatite; Titania; HA/TiO2 coatings
First Page Preview
Hydroxyapatite/titania sol–gel coatings on titanium–zirconium alloy for biomedical applications ☆
Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 3, Issue 3, May 2007, Pages 403–410
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering