阳极氧化
材料科学
钛镍合金
蚀刻(微加工)
纳米-
钛
电解质
冶金
各向同性腐蚀
纳米技术
复合材料
形状记忆合金
图层(电子)
铝
电极
物理化学
化学
作者
Zhiguang Huan,Lidy E. Fratila‐Apachitei,I. Apachitei,J. Duszczyk
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2014-01-09
卷期号:25 (5): 055602-055602
被引量:20
标识
DOI:10.1088/0957-4484/25/5/055602
摘要
The purpose of this study was to generate hybrid micro/nano-structures on biomedical nickel–titanium alloy (NiTi). To achieve this, NiTi surfaces were firstly electrochemically etched and then anodized in fluoride-containing electrolyte. With the etching process, the NiTi surface was micro-roughened through the formation of micropits uniformly distributed over the entire surface. Following the subsequent anodizing process, self-organized nanotube structures enriched in TiO2 could be superimposed on the etched surface under specific conditions. Furthermore, the anodizing treatment significantly reduced water contact angles and increased the surface free energy compared to the surfaces prior to anodizing. The results of this study show for the first time that it is possible to create hybrid micro/nano-structures on biomedical NiTi alloys by combining electrochemical etching and anodizing under controlled conditions. These novel structures are expected to significantly enhance the surface biofunctionality of the material when compared to conventional implant devices with either micro- or nano-structured surfaces.
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