Synthesis of Magnetic Powder in the Sm-Fe-N System by the Reduction-Diffusion Process

被引：5
|
作者：
Lee, Jung-Goo [1 ]
Kang, Seok-Won [1 ]
Park, Sang-Jun [1 ,2 ]
Oh, Yung-Woo [2 ]
Choi, Chul-Jin [1 ]
机构：
[1] Korea Inst Mat Sci, Funct Mat Div, Chang Won 631831, South Korea
[2] Kyungnam Univ, Div Mat Sci & Engn, Chang Won 631701, South Korea
来源：
KOREAN JOURNAL OF METALS AND MATERIALS | 2010年 / 48卷 / 09期
关键词：
reduction-diffusion; Sm-Fe-N; nitrogenation; magnetic powder; EARTH INTERMETALLIC COMPOUNDS; RARE-EARTH; SM2FE17; NITROGENATION; ABSORPTION;
D O I：
10.3365/KJMM.2010.48.09.842
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present study, the reduction-diffusion method was employed to produce Sm-Fe alloy powder. It was confirmed that the amount of unreacted alpha-Fe in Sm(2)Fe(17) matrix gradually decreased as the percentage of Sm(2)O(3) increased. Sm(2)Fe(17) single-phase powder was produced by the reduction-diffusion method with 40% excess Sm(2)O(3). The Ca and Oxygen contents of the powder were approximately 300 ppm and 1600 ppm, respectively, after washing and acid treatment By a subsequent nitrogenation, Sm(2)Fe(17)N(x). magnetic powders were produced. The coercivity of the powder increased with decreasing of the particle size by ball milling, and the highest coercivity of 2850 Oe was obtained after milling for 10 hours.
引用
收藏
页码：842 / 846
页数：5
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