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首页> 外文期刊>Journal of the Korean Physical Society >Mechanical relaxations of a Cu60Zr40 metallic glass studied by using a dynamic mechanical analysis
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Mechanical relaxations of a Cu60Zr40 metallic glass studied by using a dynamic mechanical analysis

机译：使用动态力学分析研究Cu60Zr40金属玻璃的机械弛豫

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摘要

The mechanical relaxation behaviors of a Cu60Zr40 metallic glass were investigated by using isothermal multi-frequency dynamic mechanical measurements. From the spectra of the elastic moduli, master curves were constructed using the time-temperature superposition principle. The temperature dependence of the shift factor was found to follow the Arrhenius relationship in two temperature regions, one below and the other above the glass transition temperature (Tg), and the activation energies for low-temperature relaxation and viscous flow were 32.7 kJ/mol and 307.1 kJ/mol, respectively. The decoupling of these two relaxations, shown in the temperature dependent plot of the shift factor, manifests the dynamic glass transition temperature region of the Cu60Zr40 metallic glass. From the temperature dependence of the shift factor, the fragility index of this alloy was also estimated.
机译：通过等温多频动态力学测量研究了Cu60Zr40金属玻璃的机械弛豫行为。从弹性模量的光谱，使用时间-温度叠加原理构造主曲线。发现位移因子的温度依赖性在两个温度区域内均遵循阿伦尼乌斯关系，一个低于玻璃化转变温度（Tg），另一个高于玻璃化转变温度（Tg），且低温弛豫和粘性流动的活化能为32.7 kJ / mol。和307.1 kJ / mol。这两个弛豫的解耦（显示在位移因数的温度依赖性曲线图中）显示了Cu60Zr40金属玻璃的动态玻璃化转变温度区域。从移动因子的温度依赖性，还可以估计该合金的脆性指数。

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