Seversk Technological Institute of National Research Nuclear University MEPhI

A. S. Buynovskiy, Professor of a Chair of Chemistry and Technology of Materials of Modern Energy, e-mail: bas@ssti.ru

V. L. Sofronov, Dean of a Technological Faculty

A. Yu. Makaseev, Assistant Professor, Deputy Director of Institute

Yu. N. Makaseev, Assistant Professor of a Chair of Chemistry and Technology of Materials of Modern Energy

I. Yu. Rusakov, Assistant Professor

Objective. To improve fluoride technology and equipment for obtaining magnetic materials based on rare earth metals.

Problems of the research. To determine factors influencing the composition and quality of the ingots of magnetic alloys based on Nd—Fe—B by calciethermic reduction of metal fluorides with the discharge of the metal into the mold.

Research methods. Experimental studies of the process of obtaining magnetic alloys by the calciethermic reduction of metal fluorides with the discharge of the metal into the mold were performed on the laboratory setup designed by the authors, analyses and studies of properties of raw materials and products were obtained with application of modern physical and chemical methods: the spectral-emission, atomic absorption, X-ray , microstructure, gas chromatography, and others.

Results. There has been proposed a method and apparatus for getting alloys Nd—Fe—B-alloying elements, combining two operations: the reduction and metal casting into molds in one machine. The results of studies of the process for obtaining alloys based on Nd—Fe—B with various concentrations of neodymium and there have been established the factors affecting the yield of metal into the ingot and its quality.

Conclusions. There have been studied the ways to obtain magnetic alloys based on Nd—Fe—B in the device combining two operations: reduction and pouring metal into molds. In this case, due to rapid and directional solidification of magnetic alloys we obtain fine-grained structure, and output of the main magnetic phase of Nd₂Fe₁₄B is in the range of 85–92%.

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