Nanotubular oxide layer formation on Ti–13Nb–13Zr alloy as a function of applied potential
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Abstract
Nanotubular oxide layer formation on biomedical grade α + β type Ti–13Nb–13Zr alloy was investigated using anodization technique as a function of applied dc potential (10–40 V) and anodizing time (30–180 min) in 1 M H3PO4 + 0.5 wt% NaF at room temperature. The as-formed and crystallized nanotubes were characterized using SEM, XRD, and TEM. There was a bimodal size distribution of nanotubes with diameters at the range of 25–110 nm. Nanotubes nucleated on β matrix exhibited uniform surface appearance with circular morphology, whereas those nucleated on α phase yielded parabolic shape. TEM/EDS analysis detected the three component elements of the alloy in the nanotube. Heat treatment significantly altered the distinct interface between the nanotubes and the barrier oxide layer.
Keywords
Titanium Alloy 13Zr Alloy Bimodal Size Distribution Anodization Time Dual Phase MicrostructureReferences
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