Abstract
We have examined the effect of various parameters involved in the preparation of the Nd15Fe77B8 alloy by the calciothermic reduction-diffusion process. Both Nd2O3 and NdCl3 were utilized as starting raw materials. Shorter reaction times and lower heating temperatures are required for the chloride than for the oxide. Among the characterization techniques used to evaluate the final product, Mössbauer spectroscopy was invaluable for the determination of the (Nd1.1Fe4B4)/(Nd2Fe14B) ratio, which should be as low as possible.
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Guilherme, E.G., Paschoal, J.O.A. & Rechenberg, H.R. Phase monitoring during Nd15Fe77B8 preparation by the calciothermic reduction-diffusion process. Hyperfine Interact 83, 395–398 (1994). https://doi.org/10.1007/BF02074306
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DOI: https://doi.org/10.1007/BF02074306