A molecular dynamics simulation is performed to investigate the icosahedron in Mg₇₀Zn₃₀ metallic glass during solidification at the cooling rate of 1×10¹³ K/s. It is found that the 1551, 1541 and 1431 bond-types are closely related to 13-atom icosahedron-like clusters. Two kinds of clusters are very similar to full icosahedron in geometry. The three clusters can transform into each other by changing one bond between a pair of outer atoms. One distorted icosahedron act as the intermediate between the two others. This work provides an insight into the glass formation in alloy from the cluster-level structural viewpoint and will shed light on developing more metallic glasses.

进行了分子动力学模拟，研究了在冷却速率为1×10 ¹³ K / s的Mg ₇₀ Zn ₃₀金属玻璃中的二十面体。发现1551、1541和1431键类型与13原子二十面体样簇紧密相关。两种簇的几何形状与全二十面体非常相似。通过改变一对外部原子之间的一个键，这三个簇可以相互转化。一个扭曲的二十面体充当了另外两个之间的中间。这项工作可以从团簇级结构的角度洞悉合金中的玻璃形成，并将为开发更多金属玻璃提供启示。