Advanced Functional Surface & Biomaterials Research Lab, Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials, College of Dentistry, Chosun University, Gwangju, 61452, Republic of Korea.
J Nanosci Nanotechnol. 2020 Sep 1;20(9):5791-5795. doi: 10.1166/jnn.2020.17664.
In this study, the highly ordered nanotube formation on beta typed Ti-Ta alloy surface was investigated. The Ti-Ta binary alloys were manufactured using a vacuum arc-melting furnace with varying Ta contents (10, 30, and 50 wt%), and then homogenized by heat treatment at 1050 °C for 1 h. The nanotube formation of Ti-Ta (x = 10-50 wt%) alloys were performed using a DC power source of 30 V in 1.0 M H₃PO₄ + 0.8 wt% NaF electrolyte solution for 2 hrs. The surface characterization was performed using field-emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. The microstructure of Ti-Ta alloy showed martensite structure -phase, and a '-phase structure. As the Ta content increased, the needle-like structures of and -phase gradually disappeared and only the equiaxed structure of -phase appeared. Nanotube morphology of Ti-Ta alloy changed according to Ta content. As the Ta content increased, the size of the nanotubes decreased and the number of the smaller nanotubes increased. In the cross-sectioned nanotube layer, the gap size between the nanotubes decreased as the Ta content increased.
本研究旨在探究β型 Ti-Ta 合金表面高度有序纳米管的形成。采用真空电弧熔炼炉制造 Ti-Ta 二元合金，改变 Ta 含量（10、30 和 50wt%），然后在 1050°C 下进行 1 小时的热处理以实现均匀化。在直流电源 30V、1.0M H₃PO₄+0.8wt%NaF 电解液中，通过 2 小时的处理使 Ti-Ta（x=10-50wt%）合金表面形成纳米管。采用场发射扫描电子显微镜和能谱仪进行表面特性分析。Ti-Ta 合金的微观结构显示马氏体结构-α相和β相。随着 Ta 含量的增加，α相和β相的针状结构逐渐消失，仅出现β相的等轴结构。Ti-Ta 合金的纳米管形态随 Ta 含量而变化。随着 Ta 含量的增加，纳米管的尺寸减小，较小纳米管的数量增加。在纳米管层的横截面中，随着 Ta 含量的增加，纳米管之间的间隙尺寸减小。
