Microstructural evolutions during HDDR phenomena in Sm2Fe17Nx compounds

被引：24

作者：

Okada, M

Saito, K

Nakamura, H

Sugimoto, S

Homma, M

机构：

[1] Department of Materials Science, Faculty of Engineering, Tohoku University, Sendai

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 231卷 / 1-2期

关键词：

HDDR phenomena; Sm2Fe17; compound; transmission electron microscopy; disproportionation; recombination;

D O I：

10.1016/0925-8388(95)01838-7

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：

Microstructural evolutions during HDDR phenomena in Sm2Fe17 particles were observed by transmission electron microscopy. Sm2Fe17 compounds heat-treated over 510 degrees C in a H-2 atmosphere disproportionate into SmH2 and alpha-Fe phases with crystal relationships of alpha-Fe {110} parallel to SmH2 {111}. Recombination reactions were initiated by desorbing hydrogen from SmH2 phases, and alpha-Fe phases diffuse into SmH2 particles to form Sm2+deltaFe17 phases by recombination. Prolonged aging in vacuum forms Sm2Fe17 fine grains of 100-300 nm in diameter.

引用

页码：60 / 65

页数：6

共 7 条

[1] IMPROVED MAGNETIC-PROPERTIES BY TREATMENT OF IRON-BASED RARE-EARTH INTERMETALLIC COMPOUNDS IN AMMONIA [J].