Origin of magnetic anisotropy formation in the HDDR-process of Nd2Fe14B-based alloys

被引：29

作者：

Tomida, T ^{[1
]}

Choi, P ^{[1
]}

Maehara, Y ^{[1
]}

Uehara, M ^{[1
]}

Tomizawa, H ^{[1
]}

Hirosawa, S ^{[1
]}

机构：

[1] SUMITOMO SPECIAL MET CO LTD,OSAKA 618,JAPAN

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1996年 / 242卷 / 1-2期

关键词：

hydrogenation; desorption; permanent magnet; Nd2Fe14B; anisotropy;

D O I：

10.1016/0925-8388(96)02378-X

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：

To clarify the mechanism inducing magnetic anisotropy in the hydrogenation, disproportionation, desorption and recombination process of NdFeB-based alloys, the disproportionation of Nd13.0Fe67.9Co11.0Ga1.0Zr0.1B7.0 and its relation to the magnetic properties have been investigated. The disproportionated microstructure under optimum hydriding conditions for energy product mainly consists of the coarse-grained alpha-Fe and Fe2B involving two kinds of particle. One is NdH2 particles, and the other has been identified as ''crystallographically aligned'' Nd2Fe14B particles. The size of the Nd2Fe14B particles is less than 50 nm. The crystallographic orientation of the nano-scale Nd2Fe14B particles is almost the same as that of the original Nd2Fe14B. It is therefore most likely that this nano-scale Nd2Fe14B acts as a recombination center during the desorption leading to the magnetic anisotropy formation.

引用

页码：129 / 135

页数：7

共 13 条

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