- The Effect of Excess Samarium Oxide on the Preparation of Sm-Fe Alloy Powder by Reduction-diffusion Method
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Hun Kwak, Jung-Goo Lee, Chul-Jin Choi
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J Korean Powder Metall Inst. 2009;16(5):336-341.
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DOI: https://doi.org/10.4150/KPMI.2009.16.5.336
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- To produce alloy powders with only Sm_2Fe_17 single phase by reduction-diffusion (R-D) method, the effect of excess samarium oxide on the preparation of Sm-Fe alloy powder during R-D heat treatment was studied. The quantity of samarium oxide was varied from 5% to 50% whereas iron and calcium were taken 0% and 200% in excess of chemical equivalent, respectively. The pellet type mixture of samarium, iron powders and calcium granulars was subjected to heat treatment at 1100°C for 5 hours. The R-D treated pellet was moved into deionized water and agitated to separate Sm-Fe alloy powders. After washing them in deionized water several times, the powders were washed with acetic acid to remove the undesired reaction products such as CaO. By these washing and acid cleaning treatment, only 0.03 wt% calcium remained in Sm-Fe alloy powders. It was also confirmed that the content of unreacted alpha-Fe in Sm_2Fe_17 matrix gradually decreased as the percentage of samarium oxide is increased. However, there was no significant change above 40% excess samarium oxide.
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Citations
Citations to this article as recorded by  - The Influence of Mechanical Milling on the Structure and Magnetic Properties of Sm-Fe-N Powder Produced by the Reduction-Diffusion Process
Jung-Goo Lee, Seok-Won Kang, Ping-Zhan Si, Chul-Jin Choi
Journal of Magnetics.2011; 16(2): 104. CrossRef
- Trend in Research and Development Related to Sm-Fe-N Bonded Magnets
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Jung-Goo Lee, Hun Kwak, Chul-Jin Choi, Joon-Chul Yun, Jai-Sung Lee
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J Korean Powder Metall Inst. 2009;16(1):1-8.
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DOI: https://doi.org/10.4150/KPMI.2009.16.1.001
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197
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Citations to this article as recorded by - Advanced Magnetic Actuation: Harnessing the Dynamics of Sm2Fe17–xCuxN3 Composites
Kangmo Koo, Young-Tae Kwon, Ji Young Park, Yong-Ho Choa
ACS Applied Materials & Interfaces.2024; 16(9): 11872. CrossRef
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