Phase equilibria in the Gd–Bi–Sb ternary system at room temperature

Abstract

Phase equilibria were established in the Gd–Bi–Sb ternary system at room temperature based on X-ray powder diffraction and differential scanning calorimetry analysis. The binary compounds: Gd 5Sb 3, Gd 4Sb 3, GdSb, Gd 16Sb 39, Gd 5Bi 3, Gd 4Bi 3 and GdBi have been confirmed at room temperature. No ternary compound was found in this system. The isothermal section of this system at room temperature consists of six single-phase regions, six two-phase regions and one three-phase region. Four ternary continuous solid solutions: (Sb, Bi, Gd), Gd(Sb, Bi), Gd 4(Sb, Bi) 3, Gd 5(Sb, Bi) 3 were formed in this isothermal section. The binary compounds GdBi 2 does not exist in the Gd–Bi phase diagram. The maximum solid solubility of Gd in (Sb, Bi) at room temperature is 7.5 at.%, while the solid solubility of Gd in the other solid solubility are non-observable.