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Interaction of hydroxyapatite–titanium at elevated temperature in vacuum environment

Interaction of hydroxyapatite–titanium at elevated temperature in vacuum environment,10.1016/j.biomaterials.2003.09.072,Biomaterials,Yunzhi Yang,Kyo-H

Interaction of hydroxyapatite–titanium at elevated temperature in vacuum environment   (Citations: 8)
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In this study, the interaction between hydroxyapatite (HA) and titanium (Ti) at elevated temperature in vacuum environment was investigated. The 80wt% HA–20wt% Ti powder mixtures and 90wt% HA–10wt% Ti powder mixtures were dry pressed and heat-treated at 1100°C in vacuum environment. HA powders and the commercially pure Ti powders were used as controls. The heat-treated samples were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy, scanning electron microscope (SEM) and energy disperse spectra. XRD and SEM indicated densification of metallic Ti specimens during the in-vacuum heat treatment. Heat treatment of HA specimens in vacuum resulted in the loss of hydroxyl groups as well the formation of a secondary β-tricalcium phosphate phase. Metallic Ti was not observed in the in-vacuum heat-treated HA–Ti specimens. However, α-tricalcium phosphate, tetracalcium phosphate and calcium titanium oxide were observed for the in-vacuum heat-treated HA–Ti specimens. It was concluded that the in-vacuum heat-treatment process completely converted the metal–ceramics composites to ceramic composites.
Journal: Biomaterials , vol. 25, no. 15, pp. 2927-2932, 2004
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