用蠕变法测量了PdCu_6Si_(16.5),PdNi_6Si_(16.5)和CuZr_(43)三种金属玻璃在玻璃转变温度附近的粘度-温度依赖关系。在Newtonian粘度范围内,三种玻璃的粘度-温度依赖关系均可用Fulcher-Vogel方程进行描述。方程中的常数由实验曲线所确定,并由此计算出这些玻璃的粘滞性流变的表观激活能。同时用差热分析测定了金属玻璃PdNi_6Si_(16.5)和CuZr_(43)的热转变激活能。结果发现,PdNi_6Si_(16.5)合金的粘滞性流变激活能同热转变激活能的差别很小,而CuZr_(43)合金的差别则比较大。
The temperature dependence upon the viscosity of three metallic glasses PdCu_6Si_(16.5), PdNi_6Si_(16.5) and CuZr_(43) has been determined by the creep method near the vitrification temperature tange. Under the Newtonian viscous region, this dependence may be described by the Fulcher-Vogel equation. The constants of this equation were determined experimentally and the apparent activation energy of viscous flow for these three glasses was calculated therefrom. The activation energies of thermal transformation of the glasses PdNi_6Si_(16.5) and CuZr_(43) were also determined by differential scanning calorimetry. It was found that there is no appreciable difference in activation energy between viscous flow and thermal transformation for PdNi_6Si_(16.5), but marked for CuZr_(16.5).
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