全高丰度稀土<strong>(Ce, La, Y)-Fe-B</strong>永磁的研究现状和未来发展

全高丰度稀土(Ce, La, Y)-Fe-B永磁的研究现状和未来发展

刘仲武, 周帮, 廖雪峰, 何家毅

Research Status and Future Development of (Ce, La, Y)-Fe-B Permanent Magnets Based on Full High-Abundance Rare Earth Elements

LIU Zhongwu, ZHOU Bang, LIAO Xuefeng, HE Jiayi

图7 Ce₁₇Fe_{78 -}_x B₆Ta _x (x = 0、0.75) 快淬合金的退磁曲线及其对应的微磁学模拟结果^[56] (w/o和w/分别表示不含非磁性析出相的磁体模型和含有非磁性析出相的磁体模型)

Fig.7 Demagnetization curves for the as-spun Ce₁₇Fe_{78 -}_x B₆Ta _x (x = 0, 0.75) alloys (Inset shows the bright-field TEM image of Ce₁₇Fe_77.25B₆Ta_0.75 alloy) (a), simulation demagnetization curves of the model magnets (Inset shows Ce-Fe-B magnet model with non-magnetic particles) (b), demagnetizing field distributions for both models in the saturation state (c), and magnetization reversal behaviors both models at different reversed magnetic fields (d, e)^[56] (w/o and w/ represent the magnet model without non-magnetic particles and the magnet model with non-magnetic particles, respectively; μ₀H_ext—external applied field, M_z —magnetization in z direction, M_s—saturation magnetization)