Effect of heat treatment of sintered Pr–Dy–Fe–Co–B magnets on their coercivity

Korolev D.V., Valeev R.A., Morgunov R.B., Piskorsky V.P.
UDC
621.318.2
DOI
10.18577/2307-6046-2022-0-12-39-48
Article PDF (Russian) (702.88 KB)
How to cite
Korolev D.V., Valeev R.A., Morgunov R.B., Piskorsky V.P. Effect of heat treatment of sintered Pr–Dy–Fe–Co–B magnets on their coercivity // Proceedings of VIAM. 2022. No. 12. DOI: 10.18577/2307-6046-2022-0-12-39-48. URL: https://test.viam.ru/en/journal/2022/12/4
Keywords
gyroscopes, ring magnets with radial texture, coercive force, thermal stability
Abstract

The coercive force of sintered Pr–Dy–Fe–Co–B magnets plays a decisive role for the quality and accuracy of gyroscopes and other navigation devices. The residual magnetization also plays an important role in determining the sensitivity threshold and the accuracy of the such systems. The chemical design of magnets, i. e. the selection of chemical composition, does not fully realize the best characteristics. Therefore, some success can be achieved by applying heat treatment. The article shows that the selection of the heat treatment mode of sintered magnets allows to improve their characteristics to technically acceptable values, which greatly simplifies the manufacturing technology of such magnets.

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