FORMATION OF BCC BOUNDARY PHASE IN TRANSMISSION ELECTRON-MICROSCOPY SAMPLES OF ND-FE-B SINTERED MAGNETS

被引：0
|
作者：
TSUBOKAWA, Y [1 ]
HIROSAWA, S [1 ]
SHIMIZU, R [1 ]
机构：
[1] SUMITOMO SPECIAL MET CO LTD,OSAKA 618,JAPAN
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1991年 / 30卷 / 01期
关键词：
BCC BOUNDARY PHASE; ND-FE-B; SINTERED MAGNET; TRANSMISSION ELECTRON MICROSCOPY (TEM); AMORPHOUS LIKE PHASE; AR+ IONS; OXIDATION;
D O I：
10.1143/JJAP.30.58
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
the microstructure of grain boundaries in Nd-Fe-B sintered magnets has been investigated by means of high-resolution transmission electron microscopy (HRTEM) in order to clarify the appearance of the "bcc gain boundary phase" reported earlier. No phase with bcc structure in TEM samples prepared by ion thinning in high vacuum has been observed but an amorphous like phase without bcc structure form on both surfaces of a TEM sample during ion bombardment for thinning. Heating of the samples under the presence of oxygen induces the precipitates of bcc microcrystals int he amorphous like phase. This clearly suggest that the "bcc boundary phase" is formed through the preparation procedure of TEM samples.
引用
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页码：58 / 61
页数：4
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