Electrochemical behavior and effect of heat treatment on morphology, crystalline structure of self-organized TiO2 nanotube arrays on Ti-6Al-7Nb for biomedical applications

Materials Science & Engineering. C, Materials for Biological Applications
L MohanN Rajendran

Abstract

In the present work, we investigate the formation of self-organized titanium oxide nanotube layers by anodic oxidation on titanium alloy Ti-6Al-7Nb in electrolyte solution containing sulfuric acid and hydrofluoric acid. The anodized surface was characterized by micro-Raman, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDS). The corrosion behavior of the treated and untreated samples was investigated through electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization studies in simulated body fluid (Hanks' solution). The investigations show that the native oxide on the sample is replaced by self-assembled nanoarray by anodization. FESEM of samples annealed at 450 to 800 °C show tubular morphology whereas those annealed at 850 °C show collapse of nanotubes. Electrochemical impedance data of the substrate and 10 V anodized samples were fitted with a two-time constant equivalent circuit and that of anodized samples (20, 30 V) with a three-time constant equivalent circuit.

References

Nov 15, 2003·Biomaterials·Bangcheng YangTadashi Kokubo
Oct 28, 2008·Tissue Engineering. Part a·Zhinong HuangStuart B Goodman
Nov 6, 2010·Nanomedicine : Nanotechnology, Biology, and Medicine·A SimchiA R Boccaccini
Mar 8, 2011·Colloids and Surfaces. B, Biointerfaces·Wei-qiang YuFu-qiang Zhang

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Citations

Apr 5, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Witold WalkeMarcin Basiaga
Apr 18, 2016·International Journal of Biological Macromolecules·L MohanN Rajendran
Nov 1, 2020·Journal of Materials Science. Materials in Medicine·Marcela Ferreira Dias-NetipanyjPaulo Soares
Feb 14, 2021·Materials Science & Engineering. C, Materials for Biological Applications·Karol KyziołZbigniew Grzesik
Jul 24, 2021·Materials Today Communications·L MohanTuhin Subhra Santra

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