论文标题
尖端底层冷却和层状微观结构的原位可视化，而操纵方向
In situ visualization of tip undercooling and lamellar microstructure evolution of sea ice with manipulated orientation
论文作者
论文摘要
已广泛研究了具有含有盐水通道的层状微结构的海冰生长。但是，由于先前研究中的不受控制的晶体取向，海冰的定量生长信息仍然缺乏。我们首次在原位观察到层状海冰的单向生长，并具有良好的冰晶体取向以及可视化的海冰底层过冷的尖端。提出了一个半经验模型，以定量解决与生长速度和盐度的尖端不冷的变化，并与最近的分析模型相比。通过实时观察，第一次发现了Doublon尖端在细胞冰的生长和冰树突尖端的生长方向转移中的有趣现象，这归因于海冰生长中复杂的溶质扩散和各向异性界面动力学。定量实验提供了海冰生长的明确微观方案，并将以理论方法来促进对海冰的相关研究，以描述围绕刻面冰树突状尖端的扩散场。
Sea ice growth with lamellar microstructure containing brine channels has been extensively investigated. However, the quantitative growth information of sea ice remains lack due to the uncontrolled crystalline orientation in previous investigations. For the first time, we in-situ observed the unidirectional growth of lamellar sea ice with well-manipulated ice crystal orientation and visualized tip undercooling of sea ice. A semi-empirical model was proposed to quantitatively address the variation of tip undercooling with growth velocity and salinity and compared with a very recent analytical model. With the real-time observation, interesting phenomena of doublon tip in cellular ice growth and growth direction shift of ice dendritic tip were discovered for the first time, which are attributed to the complex solutal diffusion and anisotropic interface kinetics in sea ice growth. The quantitative experiment provides a clear micro scenario of sea ice growth, and will promote relevant investigations of sea ice in terms of the theoretical approach to describing the diffusion field around faceted ice dendritic tip.
