質量分析法による Fe-Sn 系の二液相分離領域の決定および 1550℃, 1600℃での活量測定

概要

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The miscibility gap in the liquid Fe-Sn system has been determined by a Knudsen-cell mass spectrometric combination. The limits of miscibility gap could be determined in situ by this technique. The determination was performed for the composition range 10.1 to 89.2at%Sn and for the temperature range 1200 to 1600℃. The consolute point has been found to be located at about 1495℃, and the limits of the miscibility gap have been determined at various temperature. The consolute point obtained in this study is lower than the literature values. The activities of Fe and Sn at 1550℃ and 1600℃ were determined from the ion current ratios for various alloy compositions by the use of the modified Gibbs-Duhem equation. Though the activity curves exhibit large positive deviation from ideal behavior, the obtained activity curves change smoothly with the composition, which show no existance of the miscibility gap at these temperature.
社団法人日本鉄鋼協会の論文
1987-05-01