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

被引：14
|
作者：
Liang ChunYong [2 ,3 ]
Yang Yang [1 ]
Wang HongShui [3 ]
Yang JianJun [1 ]
Yang XianJin [2 ]
机构：
[1] Nankai Univ, Inst Modern Opt, Key Lab Optoelect Informat Sci & Technol, Educ Minist China, Tianjin 300071, Peoples R China
[2] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
[3] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
来源：
CHINESE SCIENCE BULLETIN | 2008年 / 53卷 / 05期
基金：
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词：
femtosecond laser; NiTi alloy; porous microstructures; grain refinement;
D O I：
10.1007/s11434-008-0149-0
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
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 microstructures from feather-like ripples to cluster-like porous textures could be formed with increasing laser energy. Particularly, when the laser energy was 400 mu J, a periodic porous metal surface was generated. 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 provides a new approach to improve the biocompatibility of NiTi-based implant devices.
引用
收藏
页码：700 / 705
页数：6
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