Texture inducement during HDDR processing of NdFeB

被引:43
作者
Gutfleisch, O
Drazic, G
Mishima, C
Honkura, Y
机构
[1] Jozef Stefan Inst, Ljubljana 1001, Slovenia
[2] Aichi Steel Corp, Aichi 4768666, Japan
关键词
electron microscopy; hydrogenation disproportionation desorption recombination (HDDR); NdFeB permanent magnets; texture;
D O I
10.1109/TMAG.2002.803078
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The microstructural changes during the hydrogenation disproportionation desorption recombination process have been characterized step by step. The magnetic properties and the degree of texture have been determined when varying the hydrogen pressure and a strong correlation was found: low hydrogen pressure during disproportionation yields an excellent degree of texture. Detailed electron microscopy revealed complex microstructures and, most importantly, we found crystallographically correlated Fe2B grains within the disproportionated material and we propose the latter phase as the anisotropy-mediating phase throughout the different stages. This mechanism is highly stable provided the appropriate hydrogen pressure is employed.
引用
收藏
页码:2958 / 2960
页数:3
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