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Sm₂Fe₁₇ Prepared by Calciothermic Reduction-Diffusion Using Different Iron Powders

2007; Trans Tech Publications; Volume: 534-536; Linguagem: Inglês

10.4028/www.scientific.net/msf.534-536.1365

1662-9760

J.C. Boareto, Juliano Soyama, Marcos Daniel Vozer Felisberto, René Hesse, A. V. A. Pinto, T. R. Taylor, Paulo A.P. Wendhausen,

Magnetic Properties and Applications

This paper compares the effect of using different types of iron powders for the preparation of Sm2Fe17 by calciothermic reduction-diffusion (CRD). Three types of iron powder were used: carbonyl, sponge and water atomized. The results show that, when immediately nitrogenated after the CRD process, Sm2Fe17 prepared from sponge and water atomized iron powders yield Sm2Fe17N3-magnets with a high degree of texture. However, after a suitable treatment with hydrogen followed by nitrogenation, Sm2Fe17-powders made from Carbonyl iron produce magnets with the best quality regarding coercivity, remanence and degree of texture.