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Influence of misch metal content on microstructure and magnetic properties of R–Fe–B magnets sintered by dual alloy method 认领 引用 被引量：4
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作者 商荣翔 熊杰夫 +8 位作者 刘丹 左淑兰 赵鑫 李锐 左文亮 赵同云 陈仁杰 孙继荣 沈保根 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第5期367-370,共4页
MM14Fe79.9B6.1/Nd13.5Fe80.5B6 magnets were fabricated by dual alloy method（MM, misch metal）. Some magnets have two Curie temperatures. Curie temperatures Tc1corresponds to the main phase which contains more La Ce, a... MM14Fe79.9B6.1/Nd13.5Fe80.5B6 magnets were fabricated by dual alloy method（MM, misch metal）. Some magnets have two Curie temperatures. Curie temperatures Tc1corresponds to the main phase which contains more La Ce, and Tc1 decreases from 276.5℃ to 256.6℃ with the content of MM increasing from 30.3 at.% to 50.6 at.%. The variation of Br with the increase of MM indicates the existence of inter-grain exchange coupling in the magnets. When MM/R ≤ 30.3 at.%,the magnetic properties can reach the level of the intrinsic coercivity Hcj≥ 7.11 kOe and the maximum energy product（BH）max≥ 41 MGOe. Compared with Nd, La and Ce are easier to diffuse to the grain boundaries in the sintering process,and this will cause the decrease of H（cj） Due to the diffusion between the grains, the atomic ratio of La, Ce, Pr, and Nd in each grain is different and the percentage of Nd in all grains is higher than that in misch metal. 展开更多
关键词 sintered Fe coercivity Curie sintering intrinsic grains magnet diffuse aligned
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