Crystallographic And Electrochemical Characteristics Of Melt-spun Ti-zr-ni-y Alloys

摘要

Ti_(45)Zr_(30)Ni_(25)Y_x (x = 1, 3, 5 and 7) alloys were prepared by melt-spinning at wheel velocity of 20 m s~(-1) The effect of additive Y on phase structure and electrochemical performance of melt-spun alloys was investigated. Ti_(45)Zr_(30)Ni_(25)Y_x melt-spun alloys were composed of I-phase and amorphous phase. The amorphous phase increased with increasing x value, indicating amorphous forming ability improved with increasing Y content. The maximum discharge capacity and high-rate dischargeability decreased with increasing x value, which may be ascribed to the decrease of nickel content. Cycling stability first increased with increasing x from 1 to 3, and then decreased when x increased to 7, which was resulted from the combined effect of the decrease of nickel content and the increase of amorphous phase.