COERCIVITY AND GRAIN-BOUNDARY MORPHOLOGY IN ND-FE-B SINTERED MAGNETS

被引：14
|
作者：
TSUBOKAWA, Y [1 ]
HIROSAWA, S [1 ]
SHIMIZU, R [1 ]
机构：
[1] SUMITOMO SPECIAL MET CO LTD,MISHIMA,OSAKA 618,JAPAN
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1990年 / 29卷 / 12期
关键词：
ND-FE-B; SINTERED MAGNETS; INTRINSIC COERCIVITY; HEAT TREATMENT; GRAIN BOUNDARY; ND-RICH PHASE; ND2FE14B; LOCAL SELF-DEMAGNETIZATION FIELD;
D O I：
10.1143/JJAP.29.2737
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The microstructure of Nd15Fe77B8 sintered permanent magnets has been investigated under a 400 kV high-resolution transmission electron microscope. With particular concern about the microstructural changes in the Nd-Nd2Fe14B interfaces, the effects of isothermal heat treatment of 870 K have been studied for a more comprehensive understanding of the coercivity-microstructure relationship in the Nd-Fe-B sintered magnets. The atomic-scale steps along the grain boundary can be observed in as-sintered samples. The steps disappear after heat treatment, and very flat interfaces are formed. This atomic-scale alignment at the grain boundary, therefore, is one of the factors affecting the coercivity of Nc-Fe-B sintered magnets.
引用
收藏
页码：2737 / 2740
页数：4
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