High coercivity in Fe-Nb-B-Dy bulk nanocrystalline magnets

被引：6
|
作者：
Ziolkowski, Grzegorz [1 ]
Chrobak, Artur [1 ]
Klimontko, Joanna [1 ]
Chrobak, Dariusz [2 ]
Zivotsky, Ondrej [3 ]
Hendrych, Ales [3 ]
Rak, Jan [2 ]
机构：
[1] Univ Silesia, Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland
[2] Univ Silesia, Inst Mat Sci, 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland
[3] VSB TU Ostrava, Dept Phys, Ostrava, Czech Republic
来源：
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2016年 / 213卷 / 11期
关键词：
alloys; Fe-Nb-B-Dy; magnetic domains; magnetic materials; nanocrystalline materials; permanent magnets; ALLOYS;
D O I：
10.1002/pssa.201600728
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The paper refers to structural and magnetic properties of the (Fe80Nb6B14)(1-x)Dy-x (x = 0.08, 0.10, 0.12, 0.16) bulk nano-crystalline alloys prepared by making use of the vacuum suction casting technique. The samples are in a form of rods with different diameters d = 1.5, 1, and 0.5 mm. The phase structure was investigated by XRD technique and reveals an occurrence of magnetically hard Dy2Fe14B as well as other relatively soft Dy-Fe, Fe-B, and Fe phases dependently on the Dy content. The alloys show hard magnetic properties with high coercive field up to 5.5 T (for x = 0.12 and d = 0.5 mm). The observed magnetic hardening effect with the increase of cooling rate (decrease of sample diameter d) can be attributed to a formation of ultra-hard magnetic objects as well as increasing role of low dimensional microstructure. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：2954 / 2958
页数：5
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