Microstructure and magnetic properties of anisotropic hot-deformed magnet of different magnetic particle sizes  

作　　者：Xu-Chao Wang Ming-Gang Zhu Wei Li Yan-Feng Li Bin Lai An Du 

机构地区：[1]Division of Functional Materials Research, Central Iron & Steel Research Institute [2]College of Sciences, Northeastern University

出　　处：《Rare Metals》2015年第4期255-258,共4页稀有金属（英文版）

基　　金：financially supported by the National High Technology Research and Development Program of China(No.2011AA03A401);the National Natural Science Foundation of China(Nos.50931001,51171049,and 51271060);the National High Technology Research and Development Program of China(No.2010CB934601)

摘　　要：In this paper, the magnetic Nd-Fe-B particles of different sizes were conducted under vacuum by the hot pressing, then cooled quickly to room temperature. Finally hot deformation was performed to get the anisotropy Nd-Fe- B magnet at a deformation rate of 70 % in the protection of argon atmosphere. NIM-2000 was used for the measurement of hysteresis loop of the samples. Meanwhile, scanning electron microscopy （SEM） was used to observe the surface morphology of the magnetic particles with different sizes and hot-deformed magnets, energy spectrum analyzer to analyze the composition of magnetic particles. The effect of magnetic particle sizes on the microstructure and magnetic properties of the hot-deformed anisotropic magnet was investigated. Anisotropic hot-deformed magnets produced from the maximum particle size of 200-350 μm have the highest magnetic properties of Br = 1.465 T, Hcj = 1,157 kA.m-1, （Bn）max = 425 kJ.m-3.In this paper, the magnetic Nd-Fe-B particles of different sizes were conducted under vacuum by the hot pressing, then cooled quickly to room temperature. Finally hot deformation was performed to get the anisotropy Nd-Fe- B magnet at a deformation rate of 70 % in the protection of argon atmosphere. NIM-2000 was used for the measurement of hysteresis loop of the samples. Meanwhile, scanning electron microscopy （SEM） was used to observe the surface morphology of the magnetic particles with different sizes and hot-deformed magnets, energy spectrum analyzer to analyze the composition of magnetic particles. The effect of magnetic particle sizes on the microstructure and magnetic properties of the hot-deformed anisotropic magnet was investigated. Anisotropic hot-deformed magnets produced from the maximum particle size of 200-350 μm have the highest magnetic properties of Br = 1.465 T, Hcj = 1,157 kA.m-1, （Bn）max = 425 kJ.m-3.

关 键 词：Magnetic property Hot-deformed magnet Magnetic particle SIZE 

分 类 号：O482.5[理学—固体物理]