Crystallization kinetics of Ni₅₉Zr₁₆Ti₁₃Si₃ Sn₂Nb₇ amorphous alloys

The non-isothermal crystallization kinetics of Ni₅₉Zr₁₆Ti₁₃Si₃ Sn₂Nb₇ amorphous ribbons was investigated by differential scanning calorimetry (DSC). The activation energies for the glass transition and crystallization at the onset, first peak crystallization temperatures are determined by means of Kissinger plots to be 568, 616 and 640 kJ/mol. The non-isothermal crystallization kinetics results show that the Avrami exponent n is 3.51±0.03, which do not vary with the heating temperature. This shows that the Ni₅₉Zr₁₆Ti₁₃Si₃ Sn₂Nb₇ amorphous alloys crystallization process can be carried out by a bulk crystallization. Large atomic size difference and negative heats of mixing coexisting with positive heats of mixing increase the thermal stability of Ni-based amorphous alloys.