Influence of pulsing current on the glass transition and crystallizing kinetics of a 1x base bulk amorphous alloy

摘要

Based on the thermal analysis, the influence of pulsing current on the glass transition and crystallizing kinetics of Zr_(41.3)Ti_(14.2)Cu_(12.8)Ni_(10.3)Be_(21.4) bulk amorphous alloy has been studied. The obtained results show that after the Zr_(41.3)Ti_(14.2)Cu_(12.8)Ni_(10.3)Be_(21.4) bulk amorphous alloy was pre-treated by high-density pulsing current at low temperature, its glass transition temperature T_g, the initial crystallizing temperature T_x and the corresponding exothermic peak of crystallization T_(pi) were reduced. But the temperature range of supercooled liquid T=T_x-T_g is almost the same. The calculated results with Kissinger equation show that the activation energy of glass transition of the alloy pretreated is reduced significantly, while the activation energy of crystallization is basically unchanged. The influence of pulsing current on the glass transition and crystallization of the Zr_(41.3)Ti_(14.2)Cu_(12.8)Ni_(10.3)Be_(21.4) bulk amorphous alloy is believed to be related with the structure relaxation of the glass caused by the current.