환원-확산법에 의한 Sm-Fe-N계 자성분말 제조

In the present study, the reduction-diffusion method was employed to produce Sm-Fe alloy powder. It was confirmed that the amount of unreacted α-Fe in Sm(2)Fe(17) matrix gradually decreased as the percentage of Sm2O3 increased. Sm2Fe17 single-phase powder was produced by the reduction-diffusion meth...

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Published in대한금속·재료학회지, 48(9) Vol. 48; no. 9; pp. 842 - 846
Main Authors 이정구, Jung Goo Lee, 강석원, Seok Won Kang, 박상준, Sang Jun Park, 오영우, Yung Woo Oh, 최철진, Chul Jin Choi
Format Journal Article
LanguageKorean
Published 대한금속재료학회 20.09.2010
대한금속·재료학회
Subjects
magnetic powder
nitrogenation
reduction-diffusion
Sm-Fe-N
재료공학
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ISSN1738-8228
2288-8241

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Summary:In the present study, the reduction-diffusion method was employed to produce Sm-Fe alloy powder. It was confirmed that the amount of unreacted α-Fe in Sm(2)Fe(17) matrix gradually decreased as the percentage of Sm2O3 increased. Sm2Fe17 single-phase powder was produced by the reduction-diffusion method with 40% excess Sm2O3. 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, Sm2Fe17Nx 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.
Bibliography:The Korean Institute of Metals and Materials
G704-000085.2010.48.9.005
ISSN:1738-8228
2288-8241