X-RAY INVESTIGATION OF Ti -DOPED HYDROXYAPATITE COATING BY MECHANICAL ALLOYING

Ahmed E. Hannora, Axaule Mamaeva, Zulkhair Aimukhametovich Mansurov

2009

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DOI 10.1142/s0218625x09013256
Data confidence 70 medium
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Abstract

Ti -addition to hydroxyapatites [Ca10(PO4)6(OH)2–HA] with 5.0 wt.% Ti content, 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 the Ti substrate. 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. The Ti -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 of Ti -doped HA and Ti -alloy substrate.