强磁场下Cu−Co难混溶合金凝固过程中晶体取向和性能的调控  

Tailoring crystal orientation and property of Cu−Co immiscible alloy during solidification under high magnetic field

作　　者：魏晨 李金山[1] 闫育洁 贺一轩 Eric BEAUGNON 王军[1] Chen WEI;Jin-shan LI;Yu-jie YAN;Yi-xuan HE;Eric BEAUGNON;Jun WANG(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China;Univ.Grenoble Alpes,INSA Toulouse,Univ.Toulouse Paul Sabatier,EMFL,CNRS,LNCMI,38000 Grenoble,France)

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072 [2]Univ.Grenoble Alpes,INSA Toulouse,Univ.Toulouse Paul Sabatier,EMFL,CNRS,LNCMI,38000 Grenoble,France

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第6期1878-1892,共15页中国有色金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.51690163,52174375);the Fund of the State Key Laboratory of Solidification Processing in NWPU,China (No.2021-TS-01);the Innovation Capability Support Program of Shaanxi Province,China (No.2020KJXX-073);the Fundamental Research Funds for the Central Universities,China.

摘　　要：对Cu50Co50合金在不同磁场强度下进行非平衡凝固实验,研究富钴相的取向、显微组织演化和磁性能。结果表明,凝固后相分离的棒状富钴相可以实现排列形态,在5 T强磁场下富钴相的晶体取向为111平行磁场方向。然而,发生二次液−液相分离的富铜相的取向没有受到HMF的显著影响。在0 T磁场下凝固的合金表现出近磁各向同性行为,而在5 T磁场下凝固的合金则表现出磁各向异性行为。合金的饱和磁化强度略有增加,矫顽力相应降低,这与富钴晶体的取向演化行为密切相关。Non-equilibrium solidification experiments were conducted on Cu50Co50 alloys under different magnetic field intensities to investigate the orientation,microstructure evolution,and magnetic properties of the Co-rich phase.The results revealed that the phase-separated rod-like Co-rich phase can realize the alignment morphology and can be oriented with the 111 crystal direction along the direction of the 5 T high magnetic field(HMF).In contrast,the orientation of the Cu-rich phase,which underwent secondary liquid−liquid phase separation,was not significantly affected by the HMF.The alloy solidified at 0 T showed near-magnetic isotropic behavior,while the alloy solidified at 5 T displayed magnetic anisotropic behavior.The saturation magnetization of the alloy increased slightly,and the coercivity decreased correspondingly,which were strictly dependent on the orientation evolution of the Co-rich crystal.

关 键 词：强磁场 显微组织演化 铜钴合金 相分离 磁性能 

分 类 号：TG146.11[一般工业技术—材料科学与工程]