High entropy alloys (HEA) based on CoNi systems contain of Mn, Cr, and Al elements were prepared through mechanical alloying and subsequent annealing method. The structural and magnetic properties of CoNi alloy system were discussed based on the results of X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and vibrating sample magnetometer (VSM) analysis methods. There were different chemical compounds formed in CoNi-Mn-Cr samples, while a simple solid solution phase with FCC or BCC structural evolved in CoNiMnCrAl high entropy alloy after mechanical milling and subsequent annealing process at 750 and 900 °C. This sample exhibited excellent soft magnetic properties with the saturation magnetization and coercivity of about 31 emu/g and 39 Oe, respectively, after annealing at 750 °C. Annealing at 900 °C could improve soft magnetic properties of CoNiMnCrAl high entropy alloy in the range of 58 emu/g for saturation of magnetization and 18 Oe for coercivity due to the formation of a single solid solution phase with BCC structure.

通过机械合金化和随后的退火方法，制备了基于CoNi系统的高熵合金（HEA），其中含有Mn，Cr和Al元素。基于X射线衍射（XRD），扫描电子显微镜（SEM），差示扫描量热法（DSC）和振动样品磁强计（VSM）的分析方法，对CoNi合金系统的结构和磁性进行了讨论。在CoNi-Mn-Cr样品中形成了不同的化学化合物，而在经过机械研磨和随后在750和900°C的退火过程之后，CoNiMnCrAl高熵合金中形成了具有FCC或BCC结构的简单固溶相。该样品在750°C退火后表现出优异的软磁性能，饱和磁化强度和矫顽力分别约为31 emu / g和39 Oe。