Impact of different Nd-rich crystal-phases on the coercivity of Nd-Fe-B grain ensembles

被引：76
|
作者：
Hrkac, G. [1 ,4 ]
Woodcock, T. G. [2 ]
Butler, K. T. [3 ]
Saharan, L.
Bryan, M. T. [4 ]
Schrefl, T. [5 ]
Gutfleisch, O. [2 ,6 ]
机构：
[1] Univ Exeter, Coll Engn Math & Phys Sci, Exeter, Devon, England
[2] IFW Dresden, Inst Metall Mat, D-01171 Dresden, Germany
[3] Univ Bath, Ctr Sustainable Chem Technol, Bath BA2 7AY, Avon, England
[4] Univ Sheffield, Dept Engn Mat, Sheffield S1JD, S Yorkshire, England
[5] St Polten Univ Appl Sci, A-3100 St Polten, Austria
[6] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany
来源：
SCRIPTA MATERIALIA | 2014年 / 70卷
关键词：
Nd-Fe-B; Permanent magnet; Coercivity; Grain boundary; Lattice minimization; ANISOTROPY; MICROSTRUCTURE; CU;
D O I：
10.1016/j.scriptamat.2013.08.029
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Aberration-corrected transmission electron microscopy, combined with atomistic simulations, has been used to study the anisotropy profiles of interfaces between metallic Nd (fcc, dhcp), Nd2O3 (hP5, cI80), NdO and the Nd2Fe14B phase. The results show that the dhcp Nd and Nd2O3-hP5 phases have a more detrimental effect on coercivity than fcc Nd, Nd2O3-c180 and NdO. The coercivity change is rooted in distortions in the Nd2Fe14B crystal lattice; the depth and magnitude of this change is a function of orientation and type of Nd-rich phase. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：35 / 38
页数：4
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