高性能Sm2Fe17N x 粉体制备的研究进展

高性能Sm₂Fe₁₇N _x 粉体制备的研究进展

何颖, 李超群, 陈小立, 龙芝梅, 赖嘉琪, 邵斌, 马毅龙, 陈登明, 董季玲

Recent Development for Preparation Processes of Sm₂Fe₁₇N _x Powders with High Magnetic Properties

HE Ying, LI Chaoqun, CHEN Xiaoli, LONG Zhimei, LAI Jiaqi, SHAO Bin, MA Yilong, CHEN Dengming, DONG Jiling

图10 Sm₂Fe₁₇N _x /Sm₂(Fe,Mn)₁₇N _x 核壳粉的制备流程图和示意图、Mn扩散Sm-Fe粉末的截面扫描电镜和元素映射图、Mn扩散Sm-Fe-N核壳粉、无Mn扩散Sm-Fe-N粉热处理前后的退磁曲线^[63]以及锌包覆Sm₂Fe₁₇N₃粉体矫顽力随锌层平均厚度的增加速率^[66]

Fig.10 Flow chart and schematic of the preparation of the Sm₂Fe₁₇N _x /Sm₂(Fe,Mn)₁₇N _x core-shell powder (a); Cross-sectional SEM and elemental mapping images of Mn-diffused Sm-Fe powder (b); demagnetization curves before and after heat treatment for Mn-diffused Sm-Fe-N core-shell powder (c) and Mn-free Sm-Fe-N powder^[63] (d); Rate of increase in coercivity of Zn-coated Sm₂Fe₁₇N₃ powders as function of average thickness of Zn layer^[66] (e)