Abstract
Experiments were carried out to investigate the Co substitution on the magnetic and physical properties of Sm2Fe17 nitriding compouds. Sm2(Fe1-xCox)17 nitriding compounds (x=0∼0.3) were prepared by heat treating fine powders of Sm2(Fe1-xCox)17 alloys in the pressure of 4.9 MPa N2 gas. From X-ray diffraction patterns, these nitriding compounds were the Th2Zn17-type structure. Sm2(Fe1-xCox)17 alloys were observed to absorb the same large amount of nitrogen as Sm2Fe17 alloy. Curie temperature of these nitriding compounds increases with increasing the Co content, and lattice parameter (a and c) decrease a little. The intrinsic coercivity of 652.5 kA/m (8.20 kOe) and Curie temperature of 556°C were achieved with Sm2(Fe0.8Co0.2)17N3.1 compounds.
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