THE EFFECT OF CARBON ON MAGNETOSTRICTIVE PROPERTIES OF THE TB0.3DY0.7FE2 ALLOY

The effect of carbon on magnetostrictive properties and microstructure of the quarternary Tb(0.3)Dy(0.7)Fe(2)Cx alloys prepared by are-melti ng and homogenization have been investigated, Magnetic properties, x-r ay diffraction and magnetostriction studies were carried out, With inc reasing x, saturation magnetization decreases substantially, but the m agnetostriction measured at a field of 2T(lambda(2T)) increases slight ly with x < 0.1 (0.13 wt%). By further increasing x, lambda(2T) decrea ses rapidly, and a second phase, (Dy,Tb)Fe3C with Curie temperature 34 0 degrees C, appears, and it becomes the dominant phase at x greater t han or equal to 0.2.