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 26.06.2010   Карта сайта     Language По-русски По-английски
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26.06.2010


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Solid State Sciences
Volume 12, Issue 7, July 2010, Pages 1047-1050













doi:10.1016/j.solidstatesciences.2010.04.014 | How to Cite or Link Using DOI
Copyright © 2010 Elsevier Masson SAS All rights reserved.
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Nanocrystalline spin coated sol–gel hydroxyapatite thin films on Ti substrate: Towards potential applications for implants



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Adele CarradòCorresponding Author Contact Information, a, E-mail The Corresponding Author and Nathalie Viarta, E-mail The Corresponding Author






a Institute de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-UDS, 23 rue du Loess, BP 43, 67034 Strasbourg cedex 2, France





Received 20 October 2009; 


revised 19 February 2010; 


accepted 20 April 2010. 


Available online 27 April 2010.







Abstract


Sol-gel spin coating is a promising process to obtain hydroxyapatite (HA) thin films. It is an alternative route to the hydroxyapatite deposition techniques usually employed to cover orthopaedic or dental titanium implant surfaces. The sol–gel (SG) parameters leading to a pure and crystalline HA coatings on Ti substrate were determined. They allow to reach a stoichiometric hydroxyapatite composition (ideal Ca/P atomic ratio 1.67) and a control of the growth of the crystalline phases. The samples, when observed by Scanning Electron Microscopy (SEM), exhibit grains of ca. 200 nm, well adapted for cell proliferation. The crystallisation of the HA films was thoroughly studied by X-Ray diffraction (XRD). The aim of this paper is to validate the sol–gel method as a processing method allowing the control of the mechanical state of the films and, in particular, of the residual stresses (RS) at metal–ceramic interfaces. These stresses were determined on titanium substrates. While the uncoated Ti substrates were in a compressive residual state, the coated ones were in a low tensile state. These results suggest that the sol–gel process is indeed a processing route to obtain HA coated Ti implants.







Graphical abstract











Keywords: Sol–gel; Residual stresses; Hydroxyapatite





Article Outline



1. Introduction
2. Experimental procedure

2.1. Synthesis of HA
2.2. Phase, morphology and composition characterisation
2.3. Residual stress analysis by X-ray diffraction

3. Results and discussion
4. Conclusions
Acknowledgements
References





























Corresponding author.












Solid State Sciences
Volume 12, Issue 7, July 2010, Pages 1047-1050




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  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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