Effect of Ni on glass-forming ability of Cu-Ti-based amorphous alloys

Abstract

Ribbons of amorphous Cu-Ti-Ni alloys were prepared by the melt spinning method. The amorphous structure of these ribbons was confirmed by X-ray diffractametry and transmission electron microscopy. The effect of Ni on the glass-forming ability of Cu-Ti-based alloys was studied by differential scanning calorimetry(DSC). It is found that the supercooled liquid region, Δ T x value shows the maximum value of 61°C at x=10 in the Cu 50Ti 50- x Ni x ( x=0, 5, 10, 15 mole fraction, %) system. And the reduced glass transition temperature, T rg, is smaller than 0.45. The glass forming ability(GFA) of Cu-Ti alloy is not effectively promoted by Ni addition.