Perfect Ternary Solid Solutions Available to Purchase

In this paper equations are developed for calculating the solidus and liquidus surfaces, with tie‐lines, for ternary systems showing complete solid solubility, based on the assumption that both liquid and solid solutions are perfect. The forms of the liquidus and solidus isotherms predicted by these equations are considered for an hypothetical example. The ternary system of gold, copper and nickel is shown to deviate markedly from ideal behavior at low mol fractions of gold, even though the copper‐nickel system is practically ideal in its binary behavior.