ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Computer modeUing of the phase diagrams of nonideal systems with the formation of solid solutions

I. Horsak and I. Sláma

Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, CS-160 00 Prague

Abstract: In the solution of the set of equations describing the liquidus and solidus curves, the presumption of the nonideality was introduced in the most simple way, analogously as for the regular solutions. Various interaction parameters both for the liquid and solid phases have been considered. The influence of these parameters as well as of the values of the enthalpy of fusion of pure components on the resulting shape of the phase diagram has been systematically investigated. At low values of the interaction parameters, a minimum or a maximum appears on the liquidus and solidus curves first. With increasing values of the interaction parameters, the phase diagrams achieve gradually the shape typical for limited solubility including metastable area and, in the limit for the interaction parameter in the solid phase approaching infinity, the shape corresponding to the immiscibility in the solid phase. The slopes of tangents to the liquidus and solidus curves in the limiting points have been determined analytically.

Full paper in Portable Document Format: 391a15.pdf

Chemical Papers 39 (1) 15–28 (1985)