IMPROVEMENT IN SURFACE PROPERTIES OF TI6AL4V ALLOY USING NITROGEN ION IMPLANTATION
Titanium and Ti6Al4V alloy are widely used as artificial hip joints, bone plates and dental implants. However; this alloy releases ions from the surface liable to do serious harm to human bodies. To overcoming surface originated problems, the most versatile and superior surface modification method is ion implantation. It has several advantages compared with other modification methods. In this study, the nitrogen was implanted by a process of ion implantation at 60 keV with different fluences of 1 x 10^16, 5 x 10^16, 1x10^17 and 5 x 10^17 ions/cm2. Corrosion resistance of Ti6Al4V and ion implanted Ti6Al4V were investigated by an electrochemical test, at 370C in ringer lactate saline solution. ICP-AES studies were carried out to determine amount of ions leached out from samples when kept immersed in ringer lactate saline solution. The implanted samples showed variation in the corrosion resistance and microhardness with varying fluences. The sample implanted at 1 X 10^17 ions/cm2 showed an optimum corrosion resistance.
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