Cause of the Failure of Sintered Blanks of Ring Nd–Dy–Fe–Co–B Magnets with a Radial Texture
- Authors: Buzenkov A.V.1, Korolev D.V.1, Morgunov R.B.2, Valeev R.A.1, Piskorskii V.P.1
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Affiliations:
- All-Russia Research Institute of Aviation Materials
- Institute of Problems of Chemical Physics, Russian Academy of Sciences
- Issue: Vol 2019, No 7 (2019)
- Pages: 733-736
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/173376
- DOI: https://doi.org/10.1134/S0036029519070036
- ID: 173376
Cite item
Abstract
Abstract—The problem of destruction of blanks of ring Nd–Dy–Fe–Co–B magnets with a radial texture and different cobalt and dysprosium contents is considered. The cause of the failure of radial rings after sintering consists in the presence of the (Nd, Dy)(Fe,Co)4B phase, which is characterized by a high linear thermal expansion coefficient. It is shown that the contribution of the (Nd, Dy)(Fe, Co)4B phase to the saturation magnetization can be neglected. The identified phase is found to have a compensation temperature of 100 K.
About the authors
A. V. Buzenkov
All-Russia Research Institute of Aviation Materials
Author for correspondence.
Email: admin@viam.ru
Russian Federation, Moscow
D. V. Korolev
All-Russia Research Institute of Aviation Materials
Email: admin@viam.ru
Russian Federation, Moscow
R. B. Morgunov
Institute of Problems of Chemical Physics, Russian Academy of Sciences
Email: admin@viam.ru
Russian Federation, Chernogolovka, Moscow oblast
R. A. Valeev
All-Russia Research Institute of Aviation Materials
Email: admin@viam.ru
Russian Federation, Moscow
V. P. Piskorskii
All-Russia Research Institute of Aviation Materials
Email: admin@viam.ru
Russian Federation, Moscow