A new type of HDDR (Hydrogénation, Disproportionation, Desorption, Recombination) processing route, in which alloys are heated up under a low pressure of H2 for the disproportionate] stage, was found to be an effective way of obtaining high remanence Nd-Fe-B ternary powders, with no large decrease in coercivity (which was the problem with the previous HDDR processing route, in which the alloys were heated under vacuum). The alloys with 0. 5 % Ga addition exhibited high coercivities of 1. 0 MAm'1 with no degradation in remanence CBr = 1. 4T).
- Anisotropic powder
- High coercivity
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering