Effect of optimized aging processing on properties of the sintered Dy-doped Nd-Fe-B permanent magnet

doi:10.1088/1674-1056/24/3/037506

›› 2015, Vol. 24 ›› Issue (3): 37506-037506.doi: 10.1088/1674-1056/24/3/037506

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Effect of optimized aging processing on properties of the sintered Dy-doped Nd-Fe-B permanent magnet

王晓丽^{a b}, 赵利娜^a, 丁开鸿^c, 崔胜利^c, 孙永聪^c, 李木森^a

a Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education, Shandong University, Jinan 250061, China;
b Jiangsu University of Science and Technology Institute of Materials, Zhenjiang 212003, China;
c Yantai Shougang Magnetic Materials Inc., Yantai 265500, China

收稿日期:2014-09-22 修回日期:2014-10-24 出版日期:2015-03-05 发布日期:2015-03-05
基金资助:
Project supported by the Chinese National Major Special Project for the Rare Earth and Rare Metallic Materials (Grant No. (2012) 1743).

Effect of optimized aging processing on properties of the sintered Dy-doped Nd-Fe-B permanent magnet

Wang Xiao-Li (王晓丽)^{a b}, Zhao Li-Na (赵利娜)^a, Ding Kai-Hong (丁开鸿)^c, Cui Sheng-Li (崔胜利)^c, Sun Yong-Cong (孙永聪)^c, Li Mu-Sen (李木森)^a

a Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education, Shandong University, Jinan 250061, China;
b Jiangsu University of Science and Technology Institute of Materials, Zhenjiang 212003, China;
c Yantai Shougang Magnetic Materials Inc., Yantai 265500, China

Received:2014-09-22 Revised:2014-10-24 Online:2015-03-05 Published:2015-03-05
Contact: Li Mu-Sen E-mail:msli@sdu.edu.cn
Supported by:
Project supported by the Chinese National Major Special Project for the Rare Earth and Rare Metallic Materials (Grant No. (2012) 1743).

摘要/Abstract

摘要： We investigate the effect of the optimized aging processing on magnetism and mechanical property of the sintered Dy-doped Nd-Fe-B permanent magnet. The experimental results show that the magnetism, especially intrinsic coercivity, of the optimized aged Dy-doped Nd-Fe-B magnet is more excellent than that of the sintered one, but the former's strength and hardness are lower than that of the latter. It was observed that the optimized aged Dy-doped Nd-Fe-B magnet have more uniform grain size, thinner (Nd, Dy)-rich boundary phase. By means of the EBSD technology, the number of larger angle grain boundaries in the optimized aged Dy-doped Nd-Fe-B magnet is more than that of the sintered one. The reasons for the increased intrinsic coercivity and decreased mechanical properties of the optimized aged Dy-doped Nd-Fe-B magnet are also discussed.

关键词: Dy-doped Nd-Fe-B magnet, magnetism, strength, morphology

Abstract: We investigate the effect of the optimized aging processing on magnetism and mechanical property of the sintered Dy-doped Nd-Fe-B permanent magnet. The experimental results show that the magnetism, especially intrinsic coercivity, of the optimized aged Dy-doped Nd-Fe-B magnet is more excellent than that of the sintered one, but the former's strength and hardness are lower than that of the latter. It was observed that the optimized aged Dy-doped Nd-Fe-B magnet have more uniform grain size, thinner (Nd, Dy)-rich boundary phase. By means of the EBSD technology, the number of larger angle grain boundaries in the optimized aged Dy-doped Nd-Fe-B magnet is more than that of the sintered one. The reasons for the increased intrinsic coercivity and decreased mechanical properties of the optimized aged Dy-doped Nd-Fe-B magnet are also discussed.

Key words: Dy-doped Nd-Fe-B magnet, magnetism, strength, morphology

中图分类号: (Permanent magnets)

75.50.Ww

75.50.Vv (High coercivity materials) 67.80.dk (Magnetic properties, phases, and NMR) 71.20.Eh (Rare earth metals and alloys)

王晓丽, 赵利娜, 丁开鸿, 崔胜利, 孙永聪, 李木森. Effect of optimized aging processing on properties of the sintered Dy-doped Nd-Fe-B permanent magnet[J]. , 2015, 24(3): 37506-037506.

Wang Xiao-Li (王晓丽), Zhao Li-Na (赵利娜), Ding Kai-Hong (丁开鸿), Cui Sheng-Li (崔胜利), Sun Yong-Cong (孙永聪), Li Mu-Sen (李木森). Effect of optimized aging processing on properties of the sintered Dy-doped Nd-Fe-B permanent magnet[J]. Chin. Phys. B, 2015, 24(3): 37506-037506.

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Effect of optimized aging processing on properties of the sintered Dy-doped Nd-Fe-B permanent magnet

Effect of optimized aging processing on properties of the sintered Dy-doped Nd-Fe-B permanent magnet

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