Microstructure and magnetic properties of (Nd,Dy)FeB and (Nd,Pr)FeB strips

被引：1
|
作者：
Park, Seung-Yeon [1 ]
Kim, Jin-Ho [1 ]
Lim, Kyoung-Mook [1 ]
Ahn, Sung-Yong [2 ]
Choi, Kang Ryong [2 ]
Kim, Chul-Sung [3 ]
机构：
[1] Korea Inst Ind Technol, Rare Met R&BD Grp, Inchon 406840, South Korea
[2] Samsung Electromech, Corp R&D Inst, Suwon 443743, South Korea
[3] Kookmin Univ, Dept Nano & Elect Phys, Seoul 136702, South Korea
来源：
JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2015年 / 66卷 / 11期
关键词：
Nd-Fe-B; Strip casting; Microstructure; Magnetic properties; Grain size; Melting temperature; PERMANENT-MAGNETS; CAST ALLOYS; ND; FE; PR; COERCIVITY;
D O I：
10.3938/jkps.66.1755
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, we investigate the effect of Dy and Pr substitution for Nd on the microstructure and the magnetic properties of Nd-Fe-B alloys fabricated by using the strip-casting process. The addition of Dy and Pr changes the melting temperature of the strips, which results in differences in undercooling during solidification. The alteration of undercooling induces variations in the nucleation frequency and the cooling rate in the strips and changes the grain size and alignment. These microstructural changes have a large effect on the coercivity of the strips. The addition of Dy improves the coercivity of the strips due to the presence of more refined and well-oriented grains, which is attributed to the high thermal gradient. The addition of Pr to strips with a low thermal gradient reduces the coercivity due to the large grain size.
引用
收藏
页码：1755 / 1760
页数：6
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