Effect of FeGa3 powder addition on the magnetic properties of NdFeB sintered magnets

Abstract

NdFeB sintered magnets with the addition of various amounts of FeGa3 powder were prepared by blending during the ball milling process, The magnetic properties and microstructure of the NdFeB magnets were studied. It was found that the addition of 0.1-0.2 wt.% FeGa3 powder increases the coercivity of the magnets without reducing the remanence. The improvement in coercivity by the addition of FeGa3 powder may be related to the formation of a Nd6Fe14-xGax (x congruent to 1) intergranular phase in the magnets.