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ArticleName Study of dependence of the Nd – Fe – B permanent magnets texture distortionof degree on pressing force and their geometric dimensions
DOI 10.17580/tsm.2021.06.07
ArticleAuthor Tarasov V. P., Krivolapova O. N., Gorelikov E. S.

NUST MISiS, Moscow, Russia:

V. P. Tarasov, Head of the Chair for Non-Ferrous Metals and Gold, Doctor of Technical Sciences, Professor, e-mail:
O. N. Krivolapova, Associate Professor of the Chair for Non-Ferrous Metals and Gold, Candidate of Technical Sciences, e-mail:
E. S. Gorelikov, Associate Professor of the Chair for Non-Ferrous Metals and Gold, Candidate of Technical Sciences, e-mail:


At present, magnets based on rare-earth metals are increasingly used: in household appliances and medicine, environmentally friendly transport, electrical and energy-saving technologies. Therefore, research to improve the quality of permanent magnets made of rare-earth metals and technology for their production is relevant. The authors investigated the dependence of the Nd – Fe – B permanent magnets texture distortion degree on the pressing force and their geometric dimensions. It was found that an increase in the size factor l/d (l is theworkpiece height; d is the workpiece minimum transverse size or its diameter) leads to a shift of the optimal specific pressing pressure towards larger values while increasing the texture distortion of compressed workpieces. It was found that when pressing long workpieces with l/d > 1.5, the texture distortion degree increases by 10–12%. An equation describing the dependence of the optimal specific pressing pressure P, which provides the minimum value of the texture distortion degree, on the ratio of the compressed sample dimensions l/d during dry pressing of powders of hard-magnetic materials was derived.
The work was performed with the financial support of the Ministry of Education and Science of the Russian Federation in the framework of fulfillment of obligations under the Grant Agreement dated September 26, 2017 No. 14.578.21.0255 (unique agreement identifier RFMEFI57817X0255).

keywords Hard-magnetic materials, permanent magnets, pressing, texture distortion degree, pressing equation

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