Influences of element segregation on the magnetic properties in nanocrystalline Nd-Ce-Fe-B alloys
Influences of element segregation on the magnetic properties in nanocrystalline Nd-Ce-Fe-B alloys
复制标题
元素偏析对纳米晶Nd-Ce-Fe-B合金磁性能的影响
DOI：
10.1016/j.matchar.2018.12.022
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发表时间：
2019-02
影响因子：
4.7
通讯作者：
Zhongwu Liu
中科院分区：
文献类型：
--
作者：
Lizhong Zhao;Chengli Li;Zhipeng Hao;Xiaolian Liu;Xuefeng Liao;Jiasheng Zhang;Kunpeng Su;Lingwei Li;Hongya Yu;Jean-Marc Greneche;Jiaying Jin;Zhongwu Liu
采用熔体旋压法制备了富稀土(Ce1−xNdx)16Fe78B6(x = 0-1)纳米晶合金。用电子能谱仪研究了合金的显微组织和稀土元素的偏析。X = 0.1、0.4、0.5、0.6、0.7和0.8合金的2：14：1晶平均ND/RE比值分别为2 2、5 2、67、74、78和81%，均大于名义比值，表明Nd2：14：1相偏析。Nd/RE比值随x的变化呈现两个阶段的增加：x = 0.1~0.5合金的平均增量远高于x = 0.5~0.8合金。绘制的2：14：1相的晶胞体积V、超精细场Bhf和自旋重取向温度TsR随x曲线变化的内禀参数也有相应的变化。高Ce富稀土的NdCe-Fe-B具有较强的元素偏析，具有高的矫直力和高的性价比。这些结果有助于理解含Ce的NdCe-Fe-B永磁体的基本机制和充分利用元素偏析。
The RE-rich (Ce1−xNdx)16Fe78B6(x = 0–1) nanocrystalline alloys were prepared by melt-spinning method. The transmission electron microscopy equipped with EDS was employed to investigate the microstructure and rare-earth element segregation. The average Nd/RE ratios in 2:14:1 grains are 22, 52, 67, 74, 78, and 81% for the x = 0.1, 0.4, 0.5, 0.6, 0.7, and 0.8 alloys, respectively, which are larger than the nominal ratios, indicating a Nd segregation in 2:14:1 phase. The Nd/RE ratio changing withxshows a two-stage of increment: the average increment in x = 0.1–0.5 alloys is much higher than that of x = 0.5–0.8 alloys. The corresponding change is also observed in the plotted intrinsic parameters of cell volumeV, hyperfine fieldBhf, and spin reorientation temperatureTSRof the 2:14:1 phase changing withxcurves. The high Ce-contained RE-rich Nd-Ce-Fe-B with strong element segregation shows high coercivities and high performance/price ratio. The present results thus contribute to understanding the fundamental mechanism of Ce-contained Nd-Ce-Fe-B permanent magnets and taking advantage of the element segregation.
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影响因子：
2.7
作者：
Pei, Kun;Zhang, Xing;Yan, Aru
通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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