Nd8.5Fe84Nb0.5Zr0.5B6Cu0.5稀土永磁合金磁性能的研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: Study on the Magnetic Properties of the Rare Earth Permanent MagnetMaterials of Nd_8.5,Fe₈₄Nb_0.5,Zr_0.5B₆,Cu_0.5

作者:: 李福山¹; 王金磊¹; 董晓源²; 李育洛¹; 黎文强¹; 1.郑州大学材料科学与工程学院,河南郑州450001;2.登封市中岳新能源科技有限公司,河南登封452470

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

摘要:: 摘要:采用熔体快淬法制备出了不同快淬速度(铜轮转速)的Nd_8.5,Fe₈₄Nb_0.5,Zr_0.5B₆,Cu_0.5,稀土永磁合金条带,研究了制备工艺和晶化工艺对该合金磁性能的影响.研究结果表明:快淬速度对该合金的磁性能有很大的影响,合金在20 m/s快淬时磁性能最佳;晶化温度过高或者晶化时间过长,都会造成晶粒尺寸过大,其比表面积减小;晶化温度过低或者晶化时间过短,晶化不完全,造成软、硬磁性相析出较少和大量非晶相的存在,都阻碍软、硬磁性之间的交换耦合作用,影响合金磁性能的提高.经最佳晶化工艺处理后合金在20 m/s快淬时具有最佳磁性能,即剩余磁饱和强度B_r=0.72T、矫顽力H_e=380.98 kA/m和最大磁能积(BH)_max= 103.72 kJ/m³.

Abstract:: Abstract:With the aim at exploiting the magnetic properties of the rare earth permanent magnetic alloy of Nd_8.5,Fe₈₄Nb_0.5,Zr_0.5B₆,Cu_0.5,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 B_r=0.72 T, coercive force H_e=380.98 kA/m and maximum mag-netic energy product (BH) max= 103.72 kJ/m³,respectively.