论文标题
液体晶体成核和液体生长：合作原子的附着和脱离
Crystal Nucleation and Growth in Liquids: Cooperative Atom Attachment and Detachment
论文作者
论文摘要
液体成核和生长的经典理论假定界面有限的活化过程，原子通过以液相的扩散系数确定的速率来单独连接增长的界面。这些假设与SuperCooled Ni和AL20NI60ZR20的分子动力学研究的结果矛盾。原子不是通过界面上的基于扩散的附件，而是通过进行小的更改加入界面，以匹配成核晶体的方向阶参数。此外，与其单独加入多个原子，随着合作原子的数量随温度降低而增加。
Classical theories of crystal nucleation and growth from the liquid assume activated processes that are interface limited, with the atoms individually joining the growing interface by jumps that occur at a rate that is determined by the diffusion coefficient in the liquid phase. These assumptions are in contradiction with the results of molecular dynamics studies that are presented here for supercooled Ni and Al20Ni60Zr20. Instead of diffusion-based attachment across the interface, atoms join the interface by making small changes so as to match the orientational order parameter of the nucleating crystal. Further, instead of joining individually multiple atoms join cooperatively, with the number of cooperative atoms increasing with decreasing temperature.
