公开(公告)号：WO2019007499A1

公开(公告)日：2019-01-10

申请号：PCT/EP2017/066794

申请日：2017-07-05

Applicant: ABB SCHWEIZ AG

Inventor： SIMON, Reinhard A. ,  JACIMOVIC, Jacim ,  HERRMANN, Lorenz ,  TOMSE, Tomaz

IPC: H01F41/02 ,  H01F1/057

Abstract: A manufacturing method of a sintered magnet is described. The method comprises forming a pre-sintering body from a first magnetic powder and a second magnetic powder (containing a heavy rare earth element, HRE) so that at least part of the second magnetic powder is provided at at least one inner portion of the pre-sintering body and surrounded from at least two opposite sides by the first magnetic powder; sintering the pre-sintering body; and annealing the sintered pre-sintering body at an annealing temperature lower than the sintering temperature, thereby causing inter-grain diffusion of HRE from the HRE reservoir zone to the grain boundary phase. After the annealing, the grain boundary phase contains the HRE in a higher concentration than the main phase.

公开(公告)号：EP3649659A1

公开(公告)日：2020-05-13

申请号：EP17736654.9

申请日：2017-07-05

Applicant: ABB Schweiz AG

Inventor： SIMON, Reinhard A. ,  JACIMOVIC, Jacim ,  HERRMANN, Lorenz ,  TOMSE, Tomaz

IPC: H01F41/02 ,  H01F1/057