Hard magnetic properties of the novel compound Sm-3(Fe,Cr)(29)C-y

The novel carbide Sm3Fe24Cr5Cy with the monoclinic Nd-3(Fe, Ti)(29) structure is synthesized by gas-solid reaction. Its hard magnetic properties, temperature stability, and corrosion resistance have been investigated by conventional methods, The hard magnetic properties were developed by the ball-milling technique. An intrinsic coercivity mu(0i) H-c of 0.80 T at 293 K has been obtained. The temperature coefficient of the remanence is worse than that of Nd-Fe-B, while the temperature coefficient of the coercivity is better. The carbide powder has good corrosion resistance in comparison with Nd-Fe-B powder.