Fe-RE-B type magnet powder, sintered magnet, and, its preparation

The magnetic powder employed for the manufacture of sintered magnets of the RE-T-B class, where RE denotes at least one rare earth, T at least one transition element and B boron, consists of the mixture of 2 powders (A) and (B) : a) the powder (A) consisting of grains of RE2T14B tetrahedral structure, T being essentially iron with Co/Fe