<報文>Fe-Si系溶融合金の水素溶解度異常性に関する一考察

概要

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The abnormality of the solubility of hydrogen in molten Fe-Si alloy has been reported by several investigators. According to their reports, the logarithm of hydrogen concentration decreases linearly with the increment of silicon concentration up to 0.5 mole fraction, but increases lineary with the increment of silicon concentration above 0.5 mole fraction. To explain this abnormal behaviour, the superlattice of CuAu type was assumed in molten Fe-Si alloy at the composition of FeSi. Applying the statistical treatment to this model, theoretical equations for the hydrogen solubility in this system were derived. Comparing them with experiments, semitheoretical equations for the abnormality of this system were obtained as follows : a) [numerical formula] b) [numerical formula] where x_<Si>, x_H are the mole fraction of silicon and hydrogen respectively, p the partial pressure of hydrogen (atm.) and T absolute temperature.
東北大学の論文
1965-03-01