强磁场定向凝固金属材料界面稳定性研究进展  

Research Progress on Interfacial Stability of Directionally Solidified Metal Materials in High Magnetic Field

作　　者：袁言鼎 董书琳 刘铁 苑轶 王凯 王强 YUAN Yanding;DONG Shulin;LIU Tie;YUAN Yi;WANG Kai;WANG Qiang(Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819 [2]东北大学冶金学院,辽宁沈阳110819

出　　处：《铸造技术》2022年第9期713-724,I0026,共13页Foundry Technology

基　　金：国家自然科学基金(51690161,52127807)。

摘　　要：强磁场定向凝固技术是一种新型凝固手段,对材料的加工与改性有着得天独厚的优势。洛伦兹力、热电磁力以及磁化力能够影响熔体流动,改变界面处的溶质分布,引起成分过冷,从而影响界面稳定性。固相处的热电磁力以及磁偶极子相互作用则可通过改变界面能来影响界面稳定性。本文主要涉及金属材料在强磁场定向凝固过程中固-液界面稳定性的问题,总结了当前研究进展,重点介绍了磁场对界面前沿溶质梯度和界面能的影响,概括了洛伦兹力、磁化力和磁偶极子相互作用机制,指出了目前主要存在的两个问题:实验定量化和多种效应耦合化,并对未来研究提出了展望。Directional solidification in high magnetic field is a new solidification method, which has unique advantages in the processing and modification of materials. Lorentz force, thermoelectric magnetic force and magnetization force can affect the melt flow, change the solute distribution at the interface, and cause constitutional supercooling, thus affecting the interface stability. The interfacial stability can be affected by changing the interfacial energy through the thermoelectric magnetic force and magnetic dipole interaction. In this paper, the current research status of interfacial stability of directionally solidified metal materials in high magnetic field is reviewed, mainly dealing with the stability of solid-liquid interface. The effects of magnetic field on the solute gradient and interface energy at the interface front are emphatically introduced, and the magnetic field mechanisms such as Lorentz force, magnetization force and magnetic dipole interaction are summarized. At present, two main problems are pointed out: quantitative experiment and coupling of multiple effects,and the prospect of future research is put forward.

关 键 词：定向凝固 强磁场 固-液界面稳定性 金属 

分 类 号：TG249[金属学及工艺—铸造] TG14[一般工业技术—材料科学与工程]