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We report a feasible and facile approach of coaxial anodic oxidation under dynamic electrolyte conditions for patterning Ti tubes. Uniform TiO2 nanotube arrays are prepared at the inner surface of Ti tubes with 930mm in length and 3mm in diameter, being the largest aspect ratio ever reported. Interestingly, a resulting structure of nanowire bundles standing upright the nanotubes, anodized at 20V for...
Nanocomposite TiSiN coatings were deposited on tool steels. Detailed mechanisms that govern the corrosion of these coated steels were revealed, following immersion tests in a 70% nitric acid solution. Pitting originated preferentially from coating defect sites and expanded with increasing immersion time. Both Young’s modulus and hardness measured by nanoindentation decreased as the corrosion damage...
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