치과임플란트용 Ti-25Ta-xHf 합금의 플라즈마 전해 산화
Plasma Electrolytic Oxidation of Ti-25Ta-xHf for Dental Implants
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Plasma electrolytic oxidation of Ti-25Ta-xHf alloy in electrolyte containing Ca and P for dental implants was investigated using various experimental techniques. Ti-25Ta-xHf (x=0 and 15 wt.%) alloys were manufactured in an arc-melting vacuum furnace. Micropores were formed in PEO films on Ti-25Ta-xHf alloys in 0.15 M calcium acetate monohydrate + 0.02 M calcium glycerophosphate at 240V, 270V and 300V for 3 min, respectively. The microstructure of Ti-25Ta-xHf alloys changed from (α'+ α") phase to (α"+𝛽) phase by addition of Hf. As the applied potential increased, the number of pore and the area ratio of occupied by micro-pore decreased, whereas the pore size increased. The anatase phase increase as the applied potential increased. Also, the crystallite size of anatase-TiO2 can be controlled by applied voltage.
Abstract
Plasma electrolytic oxidation of Ti-25Ta-xHf alloy in electrolyte containing Ca and P for dental implants was investigated using various experimental techniques. Ti-25Ta-xHf (x=0 and 15 wt.%) alloys were manufactured in an arc-melting vacuum furnace. Micropores were formed in PEO films on Ti-25Ta-xHf alloys in 0.15 M calcium acetate monohydrate + 0.02 M calcium glycerophosphate at 240V, 270V and 300V for 3 min, respectively. The microstructure of Ti-25Ta-xHf alloys changed from (α'+ α") phase to (α"+𝛽) phase by addition of Hf. As the applied potential increased, the number of pore and the area ratio of occupied by micro-pore decreased, whereas the pore size increased. The anatase phase increase as the applied potential increased. Also, the crystallite size of anatase-TiO2 can be controlled by applied voltage.
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