The effect of high concentrations of cobalt on the properties of magnets Pr–Dy–Fe–Co–B and Nd–Dy–Fe–Co–B

Valeev R.A., Korolev D.V., Morgunov R.B., Piskorsky V.P.
UDC
539.231:669.859:537.622
DOI
10.18577/2307-6046-2022-0-10-66-75
Article PDF (Russian) (619.46 KB)
How to cite
Valeev R.A., Korolev D.V., Morgunov R.B., Piskorsky V.P. The effect of high concentrations of cobalt on the properties of magnets Pr–Dy–Fe–Co–B and Nd–Dy–Fe–Co–B // Proceedings of VIAM. 2022. No. 10. DOI: 10.18577/2307-6046-2022-0-10-66-75. URL: https://test.viam.ru/en/journal/2022/10/6
Keywords
rare earth magnets, main magnetic phase, residual induction, coercive force, diffusion rate, rare earth metals
Abstract

Analysis of the magnetic hysteresis loops of permanent magnets Pr–Dy–Fe–Co–B and Nd–Dy–Fe–Co–B with a high Co content allows us to conclude that with an increase in the cobalt content in the alloy, the coercive force HcI value decreases significantly. The replacement of Nd with Pr in the alloy composition leads to a decrease in the volume fraction of the main magnetic phase R2–(FeCo)14B in the composition of sintered permanent magnets, which proportionally affects the dependence of the HcI on the Co content in the permanent magnet material. This effect is presumably related to the difference in the diffusion rate in the materials under consideration.

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