摘要
本文测量了金属玻璃Ni_(30)Zr_(70)的动态粘度和稳态粘度,结果表明,由于结构弛豫的影响,动态粘度随升温速率的减小而线性增加,在玻璃转变温度T_g以下,动态粘度与温度的关系可以用Arrhenius方程进行描述,稳态粘度与温度的依赖关系满足Fulcher-Vogel方程。从4种不同升温速率的高温(结晶开始温度T_x)动态粘度值,给出金属玻璃Ni_(30)Zr_(70)的平衡粘度。在630—670K温度范围内,平衡粘度与温度的依赖关系可以用Fulcher-Vogel方程进行描述。
The dynamic viscosity and the steady-state viscosity are measured for the metallic glass Ni80Zr70. The dynamic viscosity increases linearly with the decrease of the heating rate as a result of the structural relaxation, and the temperature dependence of the dynamic viscosity can be described by the Arrhenius equation in the temperature range below Tg. The temperature dependence of the steady-state viscosity satisfies the Fulcher-Vogel equation at temperatures below Tg. From the high temperature at temperature of the onset of crystallization dynamic viscosity values with four heating rates, the equilibrium viscosity is determined. Over the temperature range of 63C to 670K, the temperature dependence of the equilibrium viscosity is well described by the Fulcher-Vogel equation.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第2期262-268,共7页
Acta Physica Sinica