Hard magnetic properties of nanocrystalline Fe-rich Fe-Nb-Nd-B bulk alloys produced by consolidating amorphous powders

被引：8

作者：

Kojima, A

Makino, A

Inoue, A

机构：

[1] Tohoku Univ, Fac Engn, Sendai, Miyagi 980, Japan

[2] Alps Elect Co Ltd, Cent Res Lab, Nagaoka, Niigata 940, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 980, Japan

来源：

NANOSTRUCTURED MATERIALS | 1997年 / 8卷 / 08期

关键词：

Amorphous alloys - Annealing - Crystallization - High temperature effects - Iron powder metallurgy - Magnetic anisotropy - Nanostructured materials - Sintering;

D O I：

10.1016/S0965-9773(98)00049-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystailine bulk Fe88Nb2Nd5B5 and Fe76Co10Nb2Nd7B5 magnets were made by consolidating amorphous powders using an electric-pulse-current-sintering method and subsequent annealing. The bulk alloys made by consolidating amorphous powders have high densities of 7.65 -7.7 x 10(3) kg/m(3) despite the relatively low sintering temperature,presumably due to the high deformability of amorphous alloy near the crystallization temperature. The structure formed after annealing at 1023 Kf or 180 s shows a nanocrystalline composite consisting of bcc-Fe, Nd2Fe14B, and Fe3B or Fe2B phases with grain sizes of 20-40 nm. The nanocrystalline bulk Fe76Co10Nb2Nd7B5 alloy shows anisotropic hard magnetic properties and the maximum energy product (BH)(max) measured parallel to the press direction are 80 and 72 kJ/m(3) for Fe88Nb2Nd5B5 and Fe76Co10Nb2Nd7B5, respectively. (C) 1998 Acta Metallurgica Inc.

引用

页码：1015 / 1024

页数：10

共 11 条

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