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 the substitution of 36% Fe by Co raises the Curie temperature of the magnets to 576°C and lowers the TCI to ½- 0.02½ %/°C 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 ½+ 0.009½ %/°C 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.
|Translated title of the contribution||Structure and properties of R - (Fe, Co) - B (R = Nd, Dy, Ho) permanent magnets with low temperature coefficient of induction|
|Number of pages||6|
|Journal||Металловедение и термическая обработка металлов|
|Publication status||Published - 2018|
- 53.00.00 METALLURGY
Level of Research Output
- VAK List