Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping
Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping
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DOI：
10.1016/j.scriptamat.2017.12.032
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发表时间：
2018-04
影响因子：
6
通讯作者：
Xin Tang;H. Sepehri-Amin;T. Ohkubo;K. Hono
中科院分区：
文献类型：
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作者：
Xin Tang;H. Sepehri-Amin;T. Ohkubo;K. Hono
0.2 at.% Nb掺杂抑制了快淬带的表面晶化，从而抑制了热变形过程中无取向晶粒的形成，从而提高了合金的剩磁。高分辨透射电子显微镜和三维原子探针分析表明，Nb在晶界的偏聚阻碍了Nd2Fe14B晶粒的长大，从而减小了Nd2Fe14B晶粒的尺寸和长径比，提高了Nd2Fe14B的磁性能。
0.2 at.%Nb doping to a Nd12.83Fe76.7Co4.50Ga0.53B5.44alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains during the hot-deformation process to form bulk anisotropic magnet, which leads to the enhancement of remanence. High resolution transmission electron microscopy and three-dimension atom probe tomography revealed that the segregation of Nb at the grain boundaries hinders the grain growth during the hot-deformation process, thereby reducing the size and the aspect ratio of Nd2Fe14B grains and increasing coercivity.