The sintering temperature and oxygen content significantly determine the properties of porous Ti prepared by the traditional powder metallurgy route. However, it is difficult to remove the surface oxide scale on the Ti powders. Herein, porous α-Ti is prepared by an electro-assisted powder metallurgical (EPM) method using Ti powders with different particle sizes in molten CaCl2 at 850°C. The electrochemical polarization refreshes the boundaries of Ti particles and thereafter accelerates the diffusion rate of Ti atoms. The compressive strength of the EPM-Ti is 100–300 MPa, and the elastic modulus is smaller than or nearly 3 GPa. Moreover, the corrosion depth of the EPM-Ti-50 μm is ~ 36 μm after being soaked in Hanks’ solution for 90 days. The corrosion potential is − 0.12 V (versus SCE), and the passivation current density is 5.14 × 10−6 A cm−2. Therefore, the porous EPM-Ti is a promising implant material with suitable properties for human bone.

中文翻译：

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电辅助粉末冶金法制备多孔钛的力学和腐蚀性能

烧结温度和氧含量显着决定了传统粉末冶金路线制备的多孔钛的性能。然而，钛粉表面的氧化皮很难去除。在此，多孔 α-Ti 通过电辅助粉末冶金 (EPM) 方法使用不同粒径的 Ti 粉末在 850°C 的熔融 CaCl2 中制备。电化学极化刷新了钛粒子的边界，随后加快了钛原子的扩散速度。EPM-Ti 的抗压强度为 100-300 MPa，弹性模量小于或接近 3 GPa。此外，EPM-Ti-50 μm 在 Hanks 溶液中浸泡 90 天后的腐蚀深度约为 36 μm。腐蚀电位为 − 0.12 V（相对于 SCE），钝化电流密度为 5.14 × 10−6 A cm−2。