Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping

SCRIPTA MATERIALIA

卷:147

Article

Tang, Xin^1,2  Sepehri-Amin, H.¹  Ohkubo, T.¹  Hono, K.^1,2 

[1] Natl Inst Mat Sci, Elements Strategy Initiat Ctr Magnet Mat, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058577, Japan

关键词: Permanent magnet;    Nd-Fe-B;    Hot-deformed magnet;    Coerrivity;    Remanence;   

DOI  :  10.1016/j.scriptamat.2017.12.032

来源: Elsevier

【 摘 要 】

0.2 at%Nb doping to a Nd12.83Fe76.7Co4.50Ga0.53B5.44 alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains during the hot-deformation process to form bulk an isotropic 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. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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