Shuji Ueno1 and Yoshio Waseda2
1Research Student, Tohoku University, Sendai. Present address: Central Research Laboratory, UNITIKA Ltd., Uji
A theoretical equation for the interaction parameters in multi-component metallic solutions has been described by the pseudopotential formalism for the free energy coupled with the free energy of the hard sphere model. The approximate equation for the pseudopotential term has also been proposed in terms of the heat of solution at infinite dilution, in order to allow simple evaluation of the interaction parameters in various multi-component systems.
The present theory has been applied to 23 cases in non-ferrous alloys such as Pb-base and Sn-base solutions and the results of previous theoretical calculation by the hard sphere model alone, together with the further evaluation of the present work clearly suggest that the present theoretical equation by the pseudopotential formalism coupled with the hard sphere model yields a quantitatively correct prediction of the interaction parameters in multi-component metallic solutions. Numerical calculations were also made on 60 cases in Fe-base solutions closely related to steelmaking, and the agreement between calculation and experimental data appears to be at a reasonable level with the 90% reliability of agreement in sign.
interaction parameter, thermodynamics, chemical potential, liquid alloys, iron-base solutions, lead-base solutions, bismuth-base solutions, indium-base solutions, antimony-base solutions, theoretical estimation
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