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Chin. Phys. B, 2015, Vol. 24(3): 037506    DOI: 10.1088/1674-1056/24/3/037506
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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
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.
Keywords:  Dy-doped Nd-Fe-B magnet      magnetism      strength      morphology  
Received:  22 September 2014      Revised:  24 October 2014      Accepted manuscript online: 
PACS:  75.50.Ww (Permanent magnets)  
  75.50.Vv (High coercivity materials)  
  67.80.dk (Magnetic properties, phases, and NMR)  
  71.20.Eh (Rare earth metals and alloys)  
Fund: Project supported by the Chinese National Major Special Project for the Rare Earth and Rare Metallic Materials (Grant No. (2012) 1743).
Corresponding Authors:  Li Mu-Sen     E-mail:  msli@sdu.edu.cn

Cite this article: 

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 2015 Chin. Phys. B 24 037506

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