Effect of Nb addition on the crystallization behavior and magnetic properties of melt-spun Fe-rich Fe-Nd-B ribbons

被引：29

作者：

Konno, TJ ^{[1
]}

Uehara, M

Hirosawa, S

Sumiyama, K

Suzuki, K

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 98077, Japan

[2] Sumitomo Special Met Co Ltd, Osaka 618, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1998年 / 268卷 / 1-2期

关键词：

hard-magnetic materials; crystallization in amorphous system; thermal analysis; X-ray diffraction; transmission electron microscopy;

D O I：

10.1016/S0925-8388(97)00582-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We compared the crystallization behavior and subsequent magnetic properties of alpha-Fe/Nd2Fe14B-based exchange-spring magnets with and without Nb addition, using differential thermal analysis, X-ray diffraction, transmission electron microscopy, and vibrating sample magnetometer, In the optimally annealed Nd4Fe90Nb2B4 alloy, uniformly distributed alpha-Fe grains 50-80 nm in diameter are surrounded by Nd2Fe14B1 grains 10-20 nm in diameter as well as by amorphous intergranular layer regions enriched with Nb. The remanence, the coercivity, and the energy product are 1.35 T, 210 kA m(-1) (2.65 kOe) and 103 kJ m(2), respectively, In the annealed alloy without Nb, the alpha-Fe and Nd2Fe14B1 phases are brought about from two different intermediate states, resulting in a heterogeneous distribution. (C) 1998 Elsevier Science S.A.

引用

页码：278 / 284

页数：7

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