Structure and Properties of R – (Fe, Co) – B (R = Nd, Dy, Ho) Permanent Magnets with Low Temperature Coefficient of Induction

被引：0
|
作者：
A. G. Popov
D. A. Kolodkin
V. S. Gaviko
D. Yu. Vasilenko
A. V. Shitov
机构：
[1] Ural Branch of the Russian Academy of Sciencies,M. N. Mikheev Institute of Metal Phisics
[2] Ural Branch of the Russian Academy of Sciencies,Institute of Natural Sciences and Mathematics
[3] Ural Electromechanical Plant,undefined
来源：
Metal Science and Heat Treatment | 2018年 / 60卷
关键词：
permanent magnet; coercivity; magnetic susceptibility; Curie temperature; temperature coefficient of induction;
D O I：
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学科分类号：
摘要：
Two groups of sintered permanent magnets with reduced temperature coefficient of induction (TCI) are considered, i.e., (A ) (Nd0.64Dy0.36)16(Fe1 – xCox)77.5Cu0.1Ga0.3B6.1(x = 0.22 – 0.36) and (B) Nd0.64 – zDy0.36Hoz)16(Fe0.64Co0.36)77.5Cu0.1Ga0.3B6.1 ( z = 0.08 – 0.26). It is shown that substitution of 36% Fe by Co raises the Curie temperature of the magnets to 576°C and lowers the TCI to ∣ − 0.02 ∣  % /K in the range of 27 – 120°C. Substitution of Nd by Ho lowers the TCI additionally to zero at z = 0.17 and changes it to ∣ + 0.009 ∣  % /K at z = 0.26. The results of the study of the phase composition and of the microstructure of the magnets make it possible to explain the observed lowering of the coercivity under the alloying.
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页码：528 / 533
页数：5
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