Ta和Ag离子双注入Ti6Al4V合金抗Hank’s溶液腐蚀性能研究  

Corrosion Resistance of Ti6Al4V Alloy Modified by Ag and Ta Dual-Ion-Implantation in Hank’s Solution

作　　者：冷崇燕[1] 周荣[1] 张旭[2] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]北京师范大学核科学与技术学院,北京100875

出　　处：《真空科学与技术学报》2013年第1期18-23,共6页Chinese Journal of Vacuum Science and Technology

基　　金：射线束技术与材料改性教育部重点实验室开放基金项目(0604)

摘　　要：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 surfaces of Ti6Al4V alloy,a possible artificial bone material,were modified by dual-implantation of Ag and Ta ions,to improve its corrosion resistance in Hank’s solution.The impacts of the surface modification conditions,including the dosage of Ag and Ta ions,energy and incident angle of the implantations,on its microstructures and properties were evaluated.The modified surfaces were characterized with glazing angle X-ray diffraction,and X-ray photoelectron spectroscopy.The results show that the Ag,Ta dual-ion-implantation,at a Ta dose of 1.5×1017 ions/cm2 and a Ag dose of 1.0×1017 ions/cm2,significantly improves the corrosion resistance of the Ti6Al4V alloy surfaces in Hank’s solution.For example,its corrosion current decreased by 94.6%,as compared to the control sample.Possible mechanisms were also tentatively discussed.

关 键 词：TI6AL4V 离子双注入 抗腐蚀性能 表面改性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]