Microstructure and magnetic properties of anisotropic hot-deformed magnet of different magnetic particle sizes
来源期刊：Rare Metals2015年第4期
论文作者：Xu-Chao Wang Ming-Gang Zhu Wei Li Yan-Feng Li Bin Lai An Du
文章页码：255 - 258
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 lm have the highest magnetic properties of Br= 1.465 T, Hcj=1,157 k Aám-1,（BH）max= 425 k Jám-3.
Xu-Chao Wang1，Ming-Gang Zhu1，Wei Li1，Yan-Feng Li1，Bin Lai1，An Du2
1. Division of Functional Materials Research, Central Iron & Steel Research Institute2. College of Sciences, Northeastern University
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 lm have the highest magnetic properties of Br= 1.465 T, Hcj=1,157 k Aám-1,（BH）max= 425 k Jám-3.
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