Effect of potential ramp in the potentiodynamic stage of anodization on morphology of nanostructured TiO 2 developed on Ti6Al4V alloy
| Autor: | D. V. Portan, Razvan Cazacu, Zoltan German-Sallo, Gabriela Strnad, László Jakab-Farkas |
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| Rok vydání: | 2018 |
| Předmět: |
Range (particle radiation)
Materials science Morphology (linguistics) Scanning electron microscope Anodizing Titanium alloy 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Electrochemical cell Artificial Intelligence Electrode Composite material 0210 nano-technology |
| Zdroj: | Procedia Manufacturing. 22:19-26 |
| ISSN: | 2351-9789 |
| Popis: | Ti6Al4V titanium alloy samples, having disc shape of O16 x 3 mm, and an initial microrough morphology, were anodized in a custom built electrochemical cell having two electrode configuration, in 1M H3PO4 + 0.5 wt% HF electrolyte, anodization potential of 20 V, and anodization time of 30 min. The anodization potential was applied with different potential ramps (0.025, 0.05, 0.1, 0.2, 0.5, and 1 V/s). The modified surface morphology was evaluated using scanning electron microscopy (SEM). Our results show efficient synthesis of ordered nanotubular TiO2 layers on flat, microrough surfaces of two-phase Ti6Al4V alloy, and the importance of potential ramp parameter’s optimization. Potential ramps of 0.025, 0.05, and 0.1 V/s lead to development of continuous, uniform, self-ordered nanotubular TiO2 layers, with internal diameters in 25-110 nm range, and layer thickness in 150-400 nm range. Potential ramps of 0.2 and 0.5 V/s lead also to development of self-ordered nanotubular TiO2 layers, with internal diameters in 30-115 nm range, and layer thickness in 250-450 nm range, but the layers are discontinuous. |
| Databáze: | OpenAIRE |
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