Effects of an ultra-high magnetic field up to 25 T on the phase transformations of undercooled Co-B eutectic alloy  

作　　者：Yixuan He Yuhao Wua Fan Bu Chengxiong Zou Zhangchi Bian Qiliang Huang Tie Liu Qiang Wang Jun Wang Jinshan Li Eric Beaugnon 

机构地区：[1]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an.710072,China [2]Center of Advanced Lubrication and Seal Materials,Northwestern Polytechnical University.Xi'an,710072,China [3]Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education),Northeastern University.Shenyang,110819,China [4]Univ.Grenoble Alpes,INSA Toulouse,Univ.Toulouse Paul Sabatier,EMFL,CNRS,LNCMI,Grenoble,38000,France

出　　处：《Journal of Materials Science & Technology》2021年第34期79-88,共10页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51690164);the fund of National Key Laboratory for Precision Hot Processing of Metals(6142909200104);National Training Program of Innovation and Entrepreneurship for Undergraduates(S202010699137);the Fundamental Research Funds for the Central Universities;the support of the LNCMI-CNRS。

摘　　要：While there have been multiple recent reports in the literature focusing on the effects of magnetic field on the phase transformation behaviors,the research conducted with an ultra-high magnetic field greater than 20 T is still preliminary.In the current study,the structure evolution of Co-B alloys are experimentally studied with undercooling.The effects of a 25 T magnetic field on the solidification behavior and the subsequent solid-state phase transformation behavior have been investigated.The 25 T magnetic field is confirmed to have little effect on the homogeneous nucleation,but have some influence on the heterogeneous nucleation of Co_(3) B and Co_(23)B6 phases by modifying the wetting angleθ.The decomposition of Co_(23)B6 phase in the subsequent cooling process can be effectively suppressed by applying the 25 T magnetic field.The present work might be helpful for not only theoretically understanding the influence of ultra-high magnetic field on the phase transformation behaviors but a potential technology of field-manipulation of magnetic materials.

关 键 词：Ultra-high magnetic field Non-equilibrium solidification Solid-state phase transformation Metastable phase 

分 类 号：TG146.16[一般工业技术—材料科学与工程]