期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 834, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.155226
关键词
(La,Ce,Y)-Fe-B alloys; Permanent magnets; RE element Segregation; Magnetic properties; Thermal stability
资金
- National Natural Science Foundation of China [51774146]
- Guangzhou Municipal Science and Technology Program [201707010161]
Developing Ce, La, or Y based rare earth (RE) permanent magnets is a practical way to balance the utilization of RE resources. In this work, Y substitution for Ce and La is found to not only enhance the hard magnetic properties, but also significantly increase the Curie temperature T-c and thermal stability of the melt-spun (Ce0.7La0.3)(2)Fe14B alloys. To further optimize the magnetic performance, the RE-rich alloy with [(Ce0.7La0.3)(0.8)Y-0.2](17)Fe78B6 composition has been prepared. The good combination of magnetic properties with maximum energy product (BH)(max) = 7.1 MGOe, intrinsic coercivity H-cj = 357 kA/m, and remanent polarization J(r) = 0.70 T has been obtained, together with low temperature coefficients of remanence (alpha = -0.255%/K) and coercivity (beta = -0.246%/K). Importantly, RE element segregation has been confirmed in RE-rich (Ce,La,Y)-Fe-B alloys by microstructure and composition analysis. La prefers to enter into the intergranular phase than Ce and Y prefers to remain in the hard magnetic main phase, which results in increased T-c, improved magnetic properties, and enhanced thermal stability. (C) 2020 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据