Improvement in Corrosion Resistance of Biomaterial Alumina after 60 keV Nitrogen Ion Implantation

Surface modification of polycrystalline α-alumina is carried out using ion implantation. Samples were implanted at 60 keV N+ ions with different ion doses ranging from 1 × 1015 to 1 × 1017 ions/cm2. Corrosion resistance is studied in a Ringer solution. The increase in corrosion resistance is due to the compound formation studied using Fourier transform infrared spectroscopy and glancing-angle X-ray diffraction techniques. Nanohardness is more at a lower ion dose and decreases at a higher ion dose. Microstrutural investigation shows that the decrease in corrosion resistance and nanohardness at a higher ion dose is due to the damage accumulation at the surface.