注氮改性纯钛表面的微观摩擦性能研究
1材料和方法,2结果,3讨论,4参考文献,离子注入,纳米划痕,微观摩擦学,磨损机制
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[摘要]##目的改变纯钛表面的成分，提高其硬度和耐磨损性能。方法对纯钛试样表面行3×1017ions·cm-2和9×1017ions·cm-2两种剂量的氮离子注入。以能量散射光谱测定分析其表面元素的改变，显微硬度仪测量其显微硬度，纳米划痕仪测量其表面的耐磨损性能，扫描电子显微镜观察其注入前后的划痕形貌。综合分析其微观摩擦学性能的改变。结果氮离子注入后，纯钛试样表面成金黄色。在注入3×1017ions·cm-2和9×1017ions·cm-2剂量的氮离子试样表面，氮元素的原子百分率分别为24.08%和35.83%。试样表面的显微硬度值提高。纯钛的摩擦系数较氮离子注入前明显降低，其中注入剂量为9×1017ions·cm-2的纯钛较剂量为3×1017ions·cm-2的纯钛摩擦系数小。结论氮离子注入可提高纯钛的硬度，改善其耐磨损性能。
[关键词]纯钛；离子注入；纳米划痕；微观摩擦学；磨损机制
[中图分类号]R 783.1[文献标志码]A[doi]10.3969/j.issn.1673-5749.2012.03.010
Nano-friction properties research of pure titanium surface by means of nitrogen plasma ion implantation techniqueYue Hongchi, Gao Shanshan, Li Yue, Yu Haiyang.(Dept. of Prosthodontics Technology, West China School of Stomatology, Sichuan University, Chengdu 610041, China; State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China)
[Abstract]ObjectiveTo change the composition of titanium surface, and improve the wear resistance. Methods Nitrogen was implanted into the surface of pure titanium using plasma ion implantation, the ion implantation dose was 3×1017ions·cm-2and 9×1017ions·cm-2. The change of surface elements was analyzed by energy-dispersive spectrometry. The hardness of the treated samples was evaluated with micro-hardness tester. The wear resistance was measured by nano-scratch tester. The scratch morphology was analyzed by scanning electron microscope. Results The samples modified by plasma ion implantation showed light golden. The ion implantation dose of 3×1017ions·cm-2 and 9×1017ions·cm-2nitrogen atom content of the samples were 24.08% and 35.83%. The hardness of samples after ion implantation was significantly greater than the samples before ion implantation ......
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