| 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. |
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| Key Words |
| Nanotubular structure, Ti-Ta alloy, β-stabilizing element, anodizing |
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