1. Study on Oxidation Process of Sm(Co 0.6 Cu 0.08 Fe 0.3 Zr 0.02) 8.35 Magnetic Powders.
- Author
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Kim, Chung Song, Kye, Tal Hwan, U, Hyok Chol, and Rim, Jong Hyok
- Subjects
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MAGNETIC particles , *POWDERS , *DIFFERENTIAL thermal analysis , *IRON powder , *ACTIVATION energy , *OXIDATION , *PERMANENT magnets , *METALLIC glasses - Abstract
In the atmosphere, R2Co17-type SmCo-based magnetic powders (Sm(Co0.6Cu0.08Fe0.3Zr0.02)8.35) a bit different in oxidation process as compared with bulk permanent magnet. This article describes investigation of the oxidation process of Sm(Co0.6Cu0.08Fe0.3Zr0.02)8.35magnetic powders at up to 500 °C through thermogravimetric/differential thermal analysis (TG/DTA) and X-ray diffraction (XRD) technology. The result shows that oxides such as CuO, Co3O4, and CoFe2O4 are firstly formed at 225 °C and then Sm2O3 at 350 °C. At this point activation energy is 47 kJ/mol. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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