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采用Ta和Ag离子双注入对医用Ti6Al4V合金进行表面改性,以Ta离子1.5×1017ions/cm2先注入,Ag离子1×1017ions/cm2后注入合金样品表面。采用动电位极化曲线研究Ta+Ag离子双注入前后Ti6Al4V合金抗Hank′s溶液腐蚀性能,利用小角掠射X射线衍射技术研究离子双注入前后Ti6Al4V合金表面物相组成,以X射线光电子能谱技术分析离子双注入样品表面、离子注入合金腐蚀样品表面元素存在的化合态。结果表明,Ta+Ag离子双注入改善了Ti6Al4V合金抗Hank′s溶液腐蚀性能,离子双注入合金的腐蚀电流密度与对照样相比降低了94.6%。离子双注入Ti6Al4V合金表面生成的耐蚀合金层、少量单质Ta和Ag、合金表面的氧化物腐蚀阻挡层有利于合金抗Hank′s溶液腐蚀性能的改善。
The Ti6Al4V alloy was modified by double injection of Ta and Ag ions. The Ta6 + was first implanted with 1.5 × 1017ions / cm2 Ta ions and the Ag ions were implanted into the surface of the alloy after 1 × 1017ions / cm2 of Ag ions. The potentiodynamic polarization curve was used to study the corrosion resistance of Ti6Al4V alloy against Hank’s solution before and after Ta + Ag ion implantation. The phase composition of Ti6Al4V alloy before and after ion implantation was studied by using small angle grazing X-ray diffraction. The X-ray photoelectron spectroscopy Technical analysis of ion double-injection on the sample surface, ion-implanted alloy corroded sample surface element existing compound state. The results show that the double-injection of Ta + Ag ions improves the corrosion resistance of Ti6Al4V alloy against Hank’s solution. The corrosion current density of ion-implanted doublets is reduced by 94.6% compared with the control. Ion implantation of Ti6Al4V alloy surface corrosion resistance of the alloy layer, a small amount of elemental Ta and Ag, the alloy surface oxide corrosion barrier layer is conducive to the improvement of anti-Hank’s solution corrosion performance.