Ti-Hf binary alloys contained 10%,20%,30% and 40%(mass fraction)Hf were manufactured in the vacuum furnace system.And then,specimens were homogenized for 24 h at 1 000 ℃ in argon atmosphere.The formation of oxide nan...Ti-Hf binary alloys contained 10%,20%,30% and 40%(mass fraction)Hf were manufactured in the vacuum furnace system.And then,specimens were homogenized for 24 h at 1 000 ℃ in argon atmosphere.The formation of oxide nanotubes was conducted by anodic oxidation on the Ti-Hf alloy in 1 mol/L H3PO4 electrolytes containing small amounts of NaF at room temperature.The hydroxyapatite(HA) coating made of tooth ash prepared by electron-beam physical vapor deposition(EB-PVD) method.The corrosion behaviors of the specimens were examined through potentiodynamic test in 0.9% NaCl solution by potentiostat.The microstructures of the alloys were examined by field emission scanning electron microscopy(FE-SEM) and x-ray diffractometer(XRD).It was observed that the lamellar structure translated to needle-like structure with Hf contents.Nanotube formed and HA coated Ti-xHf alloys had a good corrosion resistance.展开更多
基金supported by National Research Foundation of Korea (2009-0074672)
文摘Ti-Hf binary alloys contained 10%,20%,30% and 40%(mass fraction)Hf were manufactured in the vacuum furnace system.And then,specimens were homogenized for 24 h at 1 000 ℃ in argon atmosphere.The formation of oxide nanotubes was conducted by anodic oxidation on the Ti-Hf alloy in 1 mol/L H3PO4 electrolytes containing small amounts of NaF at room temperature.The hydroxyapatite(HA) coating made of tooth ash prepared by electron-beam physical vapor deposition(EB-PVD) method.The corrosion behaviors of the specimens were examined through potentiodynamic test in 0.9% NaCl solution by potentiostat.The microstructures of the alloys were examined by field emission scanning electron microscopy(FE-SEM) and x-ray diffractometer(XRD).It was observed that the lamellar structure translated to needle-like structure with Hf contents.Nanotube formed and HA coated Ti-xHf alloys had a good corrosion resistance.
