A series of Zr_50.75Cu_35.75Al_8.5Ag₅ bulk metallic glasses (BMGs) were prepared by controlling the cooling rate and over-heating temperature. The plastic deformation behavior of the BMGs was examined. The plasticity was enhanced when the BMG was prepared at a high cooling rate and low over-heating temperature. The plasticity of the Zr-based BMGs prepared under different casting conditions was discussed based on the amount of free volume. The structural heterogeneity of the BMGs prepared with different over-heating temperatures was examined using a high-resolution transmission electron microscope and mapped by using an energy dispersive x-ray spectroscope. The results showed that a low over-heating temperature could increase the degree of heterogeneity, but an extremely low over-heating temperature could lead to nanocrystallization. The difference in the heterogeneous structures caused the distinct plastic performance of the Zr_50.75Cu_35.75Al_8.5Ag₅ BMGs prepared with different over-heating temperatures.

中文翻译：

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通过控制铸造条件提高 ZrCuAlAg 块状金属玻璃的塑性

一系列 Zr _50.75 Cu _35.75 Al _8.5 Ag ₅通过控制冷却速度和过热温度制备块状金属玻璃（BMGs）。研究了 BMG 的塑性变形行为。当 BMG 在高冷却速率和低过热温度下制备时，塑性增强。基于自由体积量讨论了在不同铸造条件下制备的 Zr 基 BMGs 的塑性。使用高分辨率透射电子显微镜检查在不同过热温度下制备的 BMG 的结构异质性，并使用能量色散 X 射线光谱仪进行映射。结果表明，较低的过热温度会增加不均匀度，但极低的过热温度会导致纳米化。_50.75 Cu _35.75 Al _8.5 Ag ₅ BMGs 在不同的过热温度下制备。