Mechanical Properties, Corrosion Resistance and Bioactivity of Oxide Layers Formed by Isothermal Oxidation of Ti-6Al-7Nb Alloy

Titanium and its alloys are among the most promising biomaterials for medical applications. In this work, isothermal oxidation of Ti-6Al-7Nb biomedical alloy towards improving mechanical properties, corrosion resistance, bioactivity has been developed. The oxide layers were formed at 600, 700, 800 °C 72 h. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), 3D profilometry, microindentation test, used to characterize microstructure, surface geometrical structure, hardness diphase (? + ?) after oxidation, respectively. vitro resistance tests carried out in a saline solution 37 using open-circuit potential method potentiodynamic measurements. Electronic properties air studied Kelvin Probe (SKP) technique. test was conducted by soaking alkali- heat-treated samples simulated body fluid 7 days. presence apatite confirmed SEM/EDS Fourier Transform Infrared Spectroscopy (FTIR) studies. thickness increased with temperature growth from 0.25 5.48 µm. It found that increasing temperature, roughness, hardness, contact difference increased. revealed HAp-forming ability biological environment.