首页 | 本学科首页   官方微博 | 高级检索  
     

关于液相形核机制的思考
引用本文:宋玉来,豆志河,刘燕,王国承,张廷安. 关于液相形核机制的思考[J]. 材料与冶金学报, 2017, 16(2). DOI: 10.14186/j.cnki.1671-6620.2017.02.004
作者姓名:宋玉来  豆志河  刘燕  王国承  张廷安
作者单位:1. 东北大学冶金学院,沈阳,110819;2. 辽宁科技大学材料与冶金学院;辽宁鞍山114051
基金项目:国家自然科学基金项目资助,973计划项目,中央直属高校基本业务费优秀科技人才培育基金
摘    要:通过对比经典形核理论与二步形核理论,结合第一性原理计算,引出经典形核理论的不足之处.二步形核理论认为,液相析出固态结构的过程经历了一个由液相内部局部波动(结构或浓度)而引发的簇状结构的生成,此类簇状结构一部分在随后的碰撞中分解消失,一部分相互连接而长大,而基于我们当前对形核的认识,实际形核是一个极其复杂的多步过程.

关 键 词:经典形核理论  二步形核理论  第一性原理  簇状结构

A cogitation on the nucleation mechanism of liquid phase
Song Yulai,Dou Zhihe,Liu Yan,Wang Guocheng,Zhang Tingan. A cogitation on the nucleation mechanism of liquid phase[J]. Journal of Materials and Metallurgy, 2017, 16(2). DOI: 10.14186/j.cnki.1671-6620.2017.02.004
Authors:Song Yulai  Dou Zhihe  Liu Yan  Wang Guocheng  Zhang Tingan
Abstract:Combined with the first principle calculation, the authors compared the classical nucleation theory with the two step nucleation theory.It was found that the classical nucleation theory have some deficiencies.The two step nucleation theory believed that the process of the solid structure formation from liquid phase went through a local fluctuations (structure or concentration) in internal liquid phase to generate a cluster structure.A part of the cluster structure disappeared in the subsequent collision, while the other part will grow up through connection with each other.Based on the authors' understanding, the actual nucleation is a complex multistep process.
Keywords:classical nucleation theory  two-step nucleation theory  first principles  cluster structure
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号