X-RAY INVESTIGATION OFTi-DOPED HYDROXYAPATITE COATING BY MECHANICAL ALLOYING

A. Hannora (), A. Mamaeva and Z. Mansurov
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A. Hannora: Al-Farabi Kazakh National University, 050038 Almaty, Kazakhstan
A. Mamaeva: Institute of Physics and Technology, 050032 Almaty, Kazakhstan
Z. Mansurov: Al-Farabi Kazakh National University, 050038 Almaty, Kazakhstan

Surface Review and Letters (SRL), 2009, vol. 16, issue 05, 781-786

Abstract: Ti-addition to hydroxyapatites[Ca10(PO4)6(OH)2–HA]with 5.0 wt.%Ticontent, was successfully deposited on titanium substrate by mechanical alloying (MA) method. The X-ray Diffraction (XRD) data indicated that some changes take place in the HA lattice as well as in theTisubstrate. The coating thickness of the as-synthesized sample was about 91.1 μm. Ti incorporation into the apatite structure caused lattice shrinkage. The heat treated sample shows that dominant phase was HA up to 600°C. TheTi-doped HA steadily transformed to β- and α-tricalcium phosphate at 800°C. Scanning Electron Microscopy (SEM) observations revealed cracks above the temperature of 600°C. The presence of cracks could be due to the difference in coefficients of thermal expansion ofTi-doped HA andTi-alloy substrate.

Keywords: Mechanical alloying; titanium coating; Ti-doped hydroxyapatites (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09013256

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