Thermodynamic assessment of the Fe-C-P system

Abstract

Thermodynamic properties and phase diagrams of the Fe-C-P system have been assessed based on thermodynamic models. The regular solution type model has been employed for the liquid phase and the two-sublattice model for the solid phases in the Fe-C-P system. The thermodynamic model parameters for the individual phases of this system have been evaluated from relevant experimental information available in the literature, using a computerized optimization technique. Several isothermal and vertical sections as well as a liquidus surface projection are calculated using the evaluated parameters, showing reasonable agreement with reported data from various sources. In comparison with a previous assessment known from the literature, the present one provides a better description for the thermodynamic behavior of the liquid phase.