2005 Volume 45 Issue 9 Pages 1226-1231
Chemical activity-temperature-composition (a-T-x-y) relationships determined by Knudsen effusion technique were made available for molten Fe-Cr-P system by a group of Russian researchers. Nevertheless, they were not presented in form of solubility x in Fe1-yCryPx as explicit functions of phosphorus activity aP and temperature T for given y and thence they are not readily usable for evaluating P solubility in molten Fe1-yCry at arbitrary T under certain aP. In the present work, effort was invested to derive empirical expression for the solubility x in Fe1-yCryPx as functions of T and aP at given y from the reported aP-T-x-y relationships in discrete tabulated format. Such analytical expression of solubility x might allow us to proceed with more profound consideration for atomic interaction and atomic configuration in the molten Fe1-yCryPx on the basis of statistical thermodynamics.
