The isothermal section of the Dy-Fe-Sb ternary system at 773Â K

The isothermal section of the Dy-Fe-Sb ternary system at 773 K has been investigated mainly by X-ray powder diffraction in this work. The existence of eight binary compounds and one ternary compound were conformed in this system. The section consists of twelve single-phase regions, twenty-two two-phase regions and eleven three-phase regions. The compound Dy4Sb3 was not stable at 773 K. The homogeneity range of ɛ (FeSb) phase extended from about 44 at.% Sb to 46 at.% Sb and the maximum solid solubility of Sb in Fe phase is about 3 at.% Sb at 773 K.