Sm/sub 2/(Co,Fe,Cu,Zr)/sub 17/ magnets with higher Fe content

The magnetic properties of Sm/sub 2/(Co,Fe,Cu,Zr)/sub 17/ magnets were improved by increasing the Fe content without raising the Zr content. With increasing Fe content, the remanence rises monotonically while the intrinsic coercive force drops sharply for 0.27<v<0.29 and then increases for 0.30<v<0.33 in Sm(Co/sub bal/Fe/sub v/Cu/sub 0.056/Zr/sub 0.02/)/sub 7.546/. For the nominal composition Sm(Co/sub 0.612/Fe/sub 0.316/Cu/sub 0.052/Zr/sub 0.02/)/sub 7.73/, most magnets developed (BH)/sub max/=31-33 MGOe while some reached 33-34 MGOe. Still higher Fe contents may result in further improvement of Sm/sub 2/TM/sub 17/ magnets.<<ETX>>