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Nitrogenation has been carried out on Sm 2 Fe 17 carbides in coarse powder (0.3–0.6 mm) form, using a mixture of nitrogen and hydrogen gases. Full nitrogenation (i.e. C + N > 2.5 per formula unit) is obtained in less than three days. The physical integrity of the powder is retained after nitrogenation. This result indicates that anisotropic magnets, at least in coarse powder form,...
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