Effect of FeGa/sub 3/ powder addition on the magnetic properties of NdFeB sintered magnets

NdFeB sintered magnets with the addition of various amounts of FeGa/sub 3/ 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.% FeCa/sub 3/ powder increases tile coercivity of the magnets without reducing the remanence. The improvement in coercivity by the addition of FeCa, powder may be related to the formation of a Nd/sub 6/Fe/sub 14-x/Ga/sub x/ (x/spl cong/1) intergranular phase in the magnets.