The phase relationship in the Co-Pb-Sb ternary system at 500Â K

The phase relationships in the Co-Pb-Sb ternary system at 500 K have been studied mainly by means of X-ray powder diffraction with the aid of differential thermal analysis and optical microscopy. There are four three-phase regions, nine two-phase regions and six single-phase regions in this ternary system at 500 K. No ternary compounds were found. The maximum solid solubility of Sb in Pb is about 3.3 at.% Sb.