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Hydroxyapatite coating on titanium by a low energy plasma spraying mini-gun

Demnati, Imane and Parco, Maria and Grossin, David and Fagoaga, Ignacio and Drouet, Christophe and Barykin, George and Combes, Christèle and Braceras, Inigo and Gonçalvès, Stéphane and Rey, Christian Hydroxyapatite coating on titanium by a low energy plasma spraying mini-gun. (2012) Surface and Coatings Technology, vol. 206 (n° 8 - 9). pp. 2346-2353. ISSN 0257-8972

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Official URL: http://dx.doi.org/10.1016/j.surfcoat.2011.10.025

Abstract

Plasma-sprayed hydroxyapatite (HA) coatings are used on metallic implants to improve osseointegration and bone growth. The purpose of this work was to determine the microstructure and composition of HA coatings obtained with a newly developed low energy plasma spray mini-gun employing an HA feedstock powder with smaller granulometry than that commonly used. The microstructure and the phase composition of the coatings obtained by varying the number of mini-gun runs were examined using scanning electron microscopy, X-ray diffraction and Fourier transform infrared and micro-Raman spectroscopy. In all cases, the results indicate the presence of an amorphous phase and oxyapatite in the coatings due to hydroxyl group removal. No other foreign crystalline phases were detected. The absence of foreign phases was attributed to the fast cooling rate of the small particles used in the experiments and the low amount of energy employed with the mini-gun. Decomposition in the υ1PO4 region of the Raman spectra allowed a semi-quantitative evaluation of the phase contents as a function of the number of runs. Micro-Raman spectroscopy appears to be a powerful technique providing comprehensive and localised information concerning calcium phosphate phases in coatings.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original version is available at http://www.sciencedirect.com The original PDF of the article can be found at Surface and Coatings Technology website :http://www.sciencedirect.com/science/article/pii/S0257897211010218
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > TEKNIMED (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > INASMET-Tecnalia (SPAIN)
Laboratory name:
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Deposited By: Denis Faragou

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