Formation, mechanical properties and corrosion resistance of Ti–Pd base glassy alloys

No biocompatible Ti-based glassy alloys without a harmful element have been reported. We have examined the mechanical and chemical properties of Ti–Pd–Zr–Si glassy alloy in comparison with pure Ti metal and Ti–6Al–4V alloy which have been used so far for biomaterials. The present Ti–Pd base glassy alloys do not contain Al and Ni elements which are considered to be rather toxic. Melt-spun Ti45Zr50−xPdxSi5 glassy alloy ribbons (x = 35, 40, 45) exhibited good bend ductility and had higher Vickers’s hardness and lower Young’s modulus as compared to pure titanium and Ti–6Al–4V alloy. In addition, the Ti45Zr50−xPdxSi5 glassy alloys had higher corrosion resistance and were passivated over a wide range and at the lower passive current density of approximately 10−2 Am−2 than at of pure titanium and Ti–6Al–4V alloy in 1 mass% lactic acid and PBS(−) solutions at 310 K.