中国物理B ›› 2024, Vol. 33 ›› Issue (9): 97504-097504.doi: 10.1088/1674-1056/ad5535
Phase structure evolution and its effect on magnetic and mechanical properties of B-doped Sm2Co17-type magnets with high Fe content
Yao-Wen Li(李耀文)1,2, Zhuang Liu(刘壮)2,3,†, Hai-Chen Wu(吴海辰)2, Fang Wang(王芳)1,‡, Chao-Qun Zhu(竺超群)2, Dong-Liang Tan(谭栋梁)2, Yu Liu(刘宇)2, Yang Yang(羊杨)2, Ming-Xiao Zhang(张明晓)2,3, Ren-Jie Chen(陈仁杰)2,3, and A-Ru Yan(闫阿儒)2,3
- 1 Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science, Shanxi Normal University, Taiyuan 030032, China;
2 CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China
Phase structure evolution and its effect on magnetic and mechanical properties of B-doped Sm2Co17-type magnets with high Fe content
Yao-Wen Li(李耀文)1,2, Zhuang Liu(刘壮)2,3,†, Hai-Chen Wu(吴海辰)2, Fang Wang(王芳)1,‡, Chao-Qun Zhu(竺超群)2, Dong-Liang Tan(谭栋梁)2, Yu Liu(刘宇)2, Yang Yang(羊杨)2, Ming-Xiao Zhang(张明晓)2,3, Ren-Jie Chen(陈仁杰)2,3, and A-Ru Yan(闫阿儒)2,3
- 1 Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science, Shanxi Normal University, Taiyuan 030032, China;
2 CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China
摘要： The unique cellular microstructure of Fe-rich Sm$_{2}$Co$_{17}$-type permanent magnets is closely associated with the structure of the solid solution precursor. We investigate the phase structure, magnetic properties, and mechanical behavior of B-doped Sm$_{2}$Co$_{17}$-type magnets with high Fe content. The doped B atoms can diffuse into the interstitial vacancy, resulting in lattice expansion and promote the homogenization of the phase organizational structure during the solid solution treatment in theory. However, the resulting second phase plays a dominant role to result in more microtwin structures and highly ordered 2 : 17R phases in the solid solution stage, which inhibits the ordering transformation of 1 : 7H phase during aging and affects the generation of the cellular structure, and to result in a decrease in magnetic properties, yet the interface formed between it and the matrix phase hinders the movement of dislocations and enhances the mechanical properties. Hence, the precipitation of high flexural strain grain boundary phase induced by B element doping is also a new and effective way to improve the flexural strain of Sm$_{2}$Co$_{17}$-type magnets. Our study provides a new understanding of the phase structure evolution and its effect on the magnetic and mechanical properties of Sm$_{2}$Co$_{17}$-type magnets with high Fe content.
中图分类号: (Magnetic anisotropy)
- 75.30.Gw