杂质
材料科学
分子间力
化学物理
粒子(生态学)
热的
温度梯度
热力学
熔化温度
离子键合
熔点
化学
离子
复合材料
分子
有机化学
物理
地质学
海洋学
量子力学
作者
Navaneeth K. Marath,J. S. Wettlaufer
出处
期刊:Soft Matter
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:16 (25): 5886-5891
被引量:8
摘要
When a particle is placed in a material with a lower bulk melting temperature, intermolecular forces can lead to the existence of a "premelted" liquid film of the lower melting temperature material. Despite the system being below the melting temperatures of both solids, the liquid film is a consequence of thermodynamic equilibrium, controlled by intermolecular, ionic and other interactions. An imposed temperature gradient drives the translation of the particle by a process of melting and refreezing known as "thermal regelation". We calculate the rate of regelation of spherical particles surrounded by premelted films that contain ionic impurities. The impurities enhance the rate of motion thereby influencing the dynamics of single particles and distributions of particles, which we describe in addition to the consequences in natural and technological settings.
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