Effect of a high-gradient magnetic field on grain refinement of a hypoeutectic Mn-Sb alloy during directional solidification  

作　　者：Jinmei Sun Tie Liu Xiaoyu Guo Shuang Yuan Jun Wang Noriyuki Hirota Qiang Wang 

机构地区：[1]Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China [2]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China [3]School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China [4]School of Metallurgy,Northeastern University,Shenyang 110819,China [5]Research Center for Fundamental Materials,National Institute for Materials Science,Tsukuba 305-0003,Japan

出　　处：《Journal of Materials Science & Technology》2024年第8期47-54,共8页材料科学技术（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2021YFB3501404);the fund of the State Key Laboratory of Solidification Processing in NWPU(Grant No.SKLSP202101).

摘　　要：The obvious grain refinement of the primary MnSb phase has been observed in the Mn-89.7 wt%Sb alloy directionally solidified under a high-gradient magnetic field.With the application of a high-gradient magnetic field,the morphology of the primary MnSb phase transformed from developed dendritic-like to equiaxed-like,and the grain size decreased by approximately 93%.Refinement of the primary MnSb phase can be attributed to the constituent supercooling in front of the solidification interface,which promoted nucleation of the primary MnSb phase.The constituent supercooling can be linked to the enrichment of the Mn solute induced by the magnetic force and the Lorentz force that drove Mn solute migration and suppressed convection.

关 键 词：Grain refinement High-gradient magnetic field Magnetic force Lorentz force Directional solidification 

分 类 号：TG13[一般工业技术—材料科学与工程]