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Study on the Magnetic Properties of the Rare Earth Permanent MagnetMaterials of Nd8.5,Fe84Nb0.5,Zr0.5B6,Cu0.5
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[1]LI Fu-shan,WANG Jin-lei,DONG Xiao-yuan,et al.Study on the Magnetic Properties of the Rare Earth Permanent MagnetMaterials of Nd8.5,Fe84Nb0.5,Zr0.5B6,Cu0.5[J].Journal of Zhengzhou University (Engineering Science),2015,36(03):82-86.[doi:10.3969/ j.issn.1671 -6833.2015.03.018]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 36 Number of periods: 2015 03 Page number: 82-86 Column: Public date: 2015-06-30
Title:
Study on the Magnetic Properties of the Rare Earth Permanent MagnetMaterials of Nd8.5,Fe84Nb0.5,Zr0.5B6,Cu0.5
Author(s):
LI Fu-shan1; WANG Jin-lei1; DONG Xiao-yuan1; LI Yu-luo1; Ll Wen-qiang1
1.School of Materials Science and Engineering, Zhengzhou University,Zhengzhou 450001,China ; 2.China Alternative EnergyTechnology Co.,Ltd. ,Dengfeng 452470,China
Keywords:
melt rapid quenching; NdFeB; magnetic property ;  crystallization technique
CLC:
TG141
DOI:
10.3969/ j.issn.1671 -6833.2015.03.018
Abstract:
Abstract:With the aim at exploiting the magnetic properties of the rare earth permanent magnetic alloy of Nd8.5,Fe84Nb0.5,Zr0.5B6,Cu0.5,we prepared ribbons deliberately at different quenching rates and then particularlyinvestigated the effect of quenching rates and annealing technique for crystallization on the magnetic propertiesof the alloy. The result shows that rapid quenching rate has great effect on the magnetic properties of the alloy.The optimum magnetic properties of the alloy are obtained at the rapid quenching rate of 20 m/s. When thecrystallization temperature is too high or the time too long, the grain of crystallization phase becomes oversizedand the specific surface area of the grain is reduced. When the crystallization temperature is too low or thetime too short,the crystallization process is incomplete,which leads to the less precipitation of soft phase andhard phase and much residue of amorphous phase,and thus exchanging coupling between soft phase and hardphase is impeded,deteriorating the improvement of magnetic properties of the alloy. The alloy prepared at thequenching rate of 20 m/s and treated by adequate crystallization technique exhibits the optimum magneticproperties,which are remanent magnetism Br=0.72 T, coercive force He =380.98 kA/m and maximum mag-netic energy product (BH) max= 103.72 kJ/m3,respectively.
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