(1. 南京工程学院 材料工程学院，南京 211167；
2. 南京工程学院 江苏省先进结构材料与应用技术重点实验室，南京 211167)
摘 要: 对固溶态Mg-Nd-Sr-Zr合金进行了钆(Gd)离子注入改性处理；采用SRIM 2008软件对Gd离子注入过程进行了模拟分析；采用光学显微镜(OM)观察了镁合金的显微组织，并利用X 射线衍射仪(XRD)分析改性层中的物相组成，同时结合X射线光电子能谱(XPS)表征改性层中化学成分与元素价态，采用电化学实验及析氢实验评价了基体镁合金与注入镁合金在模拟体液(SBF)中的生物腐蚀行为。结果表明：Gd离子注入有助于提高固溶态Mg-Nd-Sr-Zr合金在SBF中耐生物腐蚀性能，且当注入剂量为2.5×1016 cm-2时，注入镁合金的耐生物腐蚀性能最佳。
关键字: 镁合金；Gd；离子注入；生物腐蚀行为
（1. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China;
2 Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology,
Nanjing Institute of Technology, Nanjing 211167, China）
Abstract:Gadolinium (Gd) ion implantation was carried out to modify the solution-treated Mg-Nd-Sr-Zr alloy. The SRIM 2008 software was used to simulate the Gd ion implantation. The microstructure of alloy was observed by optical microscopy (OM). The phases were analyzed by X-ray diffractometry (XRD), and the chemical composition and element states of modified layer were characterized by X-ray photoelectron spectroscopy (XPS). The biocorrosion behavior of the bare and Gd-implanted alloys in simulated body fluids (SBF) was evaluated by electrochemical tests and hydrogen evolution tests. The results show that the biocorrosion resistance of solution treated Mg-Nd-Sr-Zr alloy is enhanced after Gd ion implantation. When the implantation dose is 2.5×1016 cm-2, the implanted alloy has the optimal anti-biocorrosion performance.
Key words: magnesium alloy; Gd; ion implantation; biocorrosion behavior
