Preparation of porous microstructures on NiTi alloy surface with femtosecond laser pulses

查看全文 作　　者：LIANG [1,3]ChunYong;YANG [2]Yang;WANG [3]HongShui;YANG [2]JianJun;YANG [1]XianJin

机构地区：[1]School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;[2]Institute of Modern Optics, Nankai University, Key Laboratory of Opto-electronic Information Science and Technology, EducationMinistry of China, Tianjin 300071, China;[3]School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China

出　　处：《Chinese Science Bulletin》索引2008年第53卷第5期,共6页

基　　金：Supported by the National Natural Science Foundation of China (Project No. 50471048);Specialized Research Fund for the Doctoral Program of Higher Education of China (Project No. 20040056016) 摘　　要：Porous microstructures on Nickel-Titanium (NiTi) alloy surfaces were prepared by linearly polarized femtosecond lasers with moving focal point at a certain speed. It was found that various novel micro-structures from feather-like ripples to cluster-like porous textures could be formed with increasing laser energy. Particularly, when the laser energy was 400 μJ, a periodic porous metal surface was gen-erated. Measurement of X-ray diffraction showed that the grains on the sample surface were refined through femtosecond laser ablation processes, but the crystal structures still kept their original states. Analysis by X-ray photoelectron spectroscopy revealed that Ni/Ti on the sample surface was changed with an evident oxidization of titanium element under different laser energies. This investigation pro-vides a new approach to improve the biocompatibility of NiTi-based implant devices. 关键词：镍钛合金表面结构微观结构毫微秒激光检测

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Preparation of porous microstructures on NiTi alloy surface with femtosecond laser pulses

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