Corrosion behavior and surface characterization of tantalum implanted TiNi alloy

被引:47
|
作者
Li, Yan [1 ]
Wei, Songbo [1 ]
Cheng, Xiangqian [2 ,3 ]
Zhang, Tao [2 ,3 ]
Cheng, Guoan [2 ,3 ]
机构
[1] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Beijing Normal Univ, Natl Minist Educ China, Key Lab Radiat Beam Technol, Beijing 100875, Peoples R China
[3] Beijing Normal Univ, Inst Low Energy Nucl Phys, Beijing 100875, Peoples R China
来源
SURFACE & COATINGS TECHNOLOGY | 2008年 / 202卷 / 13期
关键词
PIII; TiNi; tantalum; corrosion;
D O I
10.1016/j.surfcoat.2007.11.003
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
TiNi shape memory alloy has been modified by Ta plasma immersion ion implantation technology to improve corrosion resistance. The results of the polarization tests show that the corrosion resistance of TiNi alloy in Ringer's solution at 310 K has been improved by the Ta ion implantation and the Ta/TiNi sample with a moderate incident dose of 1.5 x 10(17) ions/cm(2) exhibits the best corrosion resistance ability. The surface characterization and chemical composition of the Ta/TiNi samples were determined by Auger electron spectroscopy (AES), Atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) methods. AFM images reveal that compact aggregates of nano-grains uniformly disperse on the surface of the Ta/TiNi samples. AES and XPS analyses on the Ta/TiNi sample show that the component of the surface layer is mainly composed of TiO2 and Ta2O5, which is benefit to the corrosion resistance ability and biocompatibility. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:3017 / 3022
页数:6
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