The relationship between viscosity and glass forming ability of Al-(Ni)-Yb alloy systems
The relationship between viscosity and glass forming ability of Al-(Ni)-Yb alloy systems
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DOI：
10.1007/s11433-010-0142-x
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发表时间：
2010-03
期刊：
影响因子：
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通讯作者：
R. Jia;X. Bian;XiaoQian Lü;K. Song;Xueliang Li
中科院分区：
文献类型：
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作者：
R. Jia;X. Bian;XiaoQian Lü;K. Song;Xueliang Li
使用扭转振荡粘度计测量 Al-Yb 和 Al-Ni-Yb 过热熔体的动态粘度。结果表明，粘度的温度依赖性很好地符合阿伦尼乌斯定律，并计算了拟合因子。采用熔体纺丝技术制备了这些合金的非晶薄带，并利用差示扫描量热法（DSC）对其热性能进行了表征。在Al-Yb和Al-Ni-Yb体系中，反映粘度变化率的E（粘性流活化能）与GFA具有良好的负相关关系。然而，液相线粘度 (ηL) 和 GFA 之间没有直接关系。过热脆性M可以预测Al-Yb或Al-Ni-Yb合金体系中的GFA。
The dynamic viscosity of Al-Yb and Al-Ni-Yb superheated melts was measured using a torsional oscillation viscometer. The results show that the temperature dependence of viscosity fits the Arrhenius law well and the fitting factors are calculated. The amorphous ribbons of these alloys were produced by the melt spinning technique and the thermal properties were characterized by using a differential scanning calorimetry (DSC).E(the activation energy for viscous flow), which reflects the change rate of viscosity, has a good negative relation with the GFA in both Al-Yb and Al-Ni-Yb systems. However, there is no direct relation between liquidus viscosity (ηL) and GFA. The superheated fragilityMcan predict GFA in Al-Yb or Al-Ni-Yb alloy system.