Magnets with high temperature stability for navigation

Potapov M.V., Buzenkov A.V., Morgunov R.B., Piskorsky V.P.
UDC
669.859:537.622
DOI
10.18577/2307-6046-2025-0-12-63-73
Article PDF (Russian) (681.53 KB)
How to cite
Potapov M.V., Buzenkov A.V., Morgunov R.B., Piskorsky V.P. Magnets with high temperature stability for navigation // Proceedings of VIAM. 2025. No. 12. DOI: 10.18577/2307-6046-2025-0-12-63-73. URL: https://test.viam.ru/en/journal/2025/12/6
Keywords
permanent magnets, rare-earth magnets, saturation magnetization, residual induction, coercive force, squareness factor of demagnetization curves, temperature induction coefficient, temperature coefficient coercive force
Abstract

Materials of Fe–Ni–Al–Co and Pr–Nd–Dy–Fe–Co–B systems were studied in the article. Sintering and further heat treatment in the form of high temperature annealing, cooling in a magnetic field, and a stepwise annealing were performed. The effect of heat treatment on the magnetic properties of the samples, as well as the temperature coefficient of induction were investigated. It is shown that these sintered materials are similar in magnitude to AlNiCo magnets. The negative effect of neodymium impurity on the thermal stability of the material has been revealed. In order to improve temperature stability, it is necessary to increase the cobalt content.

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