金属溶液の相互作用パラメーターに関する理論的研究

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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 was also obtained in terms of the heat of solution at infinite dilution, in order to allow easy estimation of the interaction parameters in various metallic solutions. The approximate expression was applied to 23 cases in non-ferrous alloys based on Pb, Sn, In, Bi and Sb. Numerical calculations were also made on 40 cases in Fe-base solutions. The agreement between calculation and experimental data appears to be reasonable with the 90% reliability in predicting the correct sign. Thus, the present theoretical equation can give a quantitatively correct prediction of the interaction parameters in various metallic solutions by considering the pseudoptential formalism coupled with the hard sphere model. The interaction parameters in silicon melt was estimated for 14 minor elements with oxygen by applying the approximate equation presently introduced. The results are useful in making qualitative discussion about the solubility of oxygen in silicon melt, when direct measurements are not available, although the comparison was made only with the presently available experimental data of four cases.報文Original Paper
東北大学の論文