Louzguine-Luzgin D V
Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Aoba-Ku, Sendai 980-8577, Japan.
MathAM-OIL, National Institute of Advanced Industrial Science and Technology (AIST), Sendai 980-8577, Japan.
Materials (Basel). 2022 Oct 18;15(20):7285. doi: 10.3390/ma15207285.
The present review is related to the studies of structural changes observed in metallic glass-forming liquids on cooling and subsequent vitrification in terms of radial distribution function and its analogues. These structural changes are discussed in relationship with liquid's properties, especially the relaxation time and viscosity. These changes are found to be directly responsible for liquid fragility: deviation of the temperature dependence of viscosity of a supercooled liquid from the Arrhenius equation through modification of the activation energy for viscous flow. Further studies of this phenomenon are necessary to provide direct mathematical correlation between the atomic structure and properties.
本综述涉及在冷却过程中以及随后通过径向分布函数及其类似物进行玻璃化处理时,在金属玻璃形成液体中观察到的结构变化的研究。这些结构变化与液体的性质相关,尤其是弛豫时间和粘度。发现这些变化直接导致液体的脆性:通过改变粘性流动的活化能,过冷液体的粘度温度依赖性偏离阿累尼乌斯方程。对这一现象进行进一步研究,以提供原子结构与性质之间的直接数学关联,是很有必要的。