| Title |
Nanotubular Structure Formation on Ti-6Al-4V and Ti-Ta Alloy Surfaces by Electrochemical Methods |
| Authors |
(Kang Lee); (Han Cheol Choe); (Yeong Mu Ko); (W. A. Brentley) |
| DOI |
https://doi.org/10.3365/KJMM.2012.50.2.164 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Nanotubular structure; Ti-Ta alloy; β-stabilizing element; anodizing |
| Abstract |
Nanotubular structure formation on the Ti-6Al-4V and Ti-Ta alloy surfaces by electrochemical methods has been studied using the anodizing method. A nanotube layer was formed on Ti alloys in 1.0 M H3PO4 electrolyte with small additions of F- ions. The nanotube nucleation and growth of the α-phase and β-phase appeared differently, and showed different morphology for Cp-Ti, Ti-6Al-4V and Ti-Ta alloys. In the α-phase of Cp-Ti and martensite α′, and in the α″ and β-phase of the Ti-Ta alloy, the nanotube showed a clearly highly ordered TiO2 layer. In the case of the Ti-Ta alloy, the pore size of the nanotube was smaller than that of the Cp-Ti due to the β-stabilizing Ta element. In the case of the Ti-6Al-4V alloy, the α-phase showed a stable porous structure; the β-phase was dissolved entirely. The nanotube with two-size scale and high order showed itself on Ti-Ta alloys with increasing Ta content. |