Special features of Nd(Pr) – Dy – Fe – Co – B magnets with high content of Co

The effect of cobalt content in sintered magnets of the Nd(Pr) – Dy – Fe – Co – B system on the sintering temperature, at which the density is equal to 99% of the maximum value and the coercive force H ci is the highest, is determined. The main components forming the liquid phase in sintering of the materials are determined. It is shown that the addition of (Pr, Dy)(Fe, Co) 2 B 2 intermetallic to alloy (Pr, Dy) – (Fe 1 – y Co y ) ( y ≈ 0.5) during the operation of fine milling of sintered magnets has a positive effect on the value of H ci .