Abstract
The activities of iron (Fe) and aluminum (Al) were measured in Fe-Al alloys at 1573 K using the ion-current-ratio technique in a high-temperature Knudsen cell mass spectrometer. The Fe-Al solutions exhibited negative deviations from ideality over the entire composition range. The activity coefficientsγ Fe, andγ A1 are given by the following equations as a function of mole fraction (x Fe,x Al):
The results showed good agreement with those obtained from previous investigations at other temperatures by extrapolation of the activity data to 1573 K.
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Jacobson, N.S., Mehrotra, G.M. Thermodynamics of iron-aluminum alloys at 1573 K. Metall Trans B 24, 481–486 (1993). https://doi.org/10.1007/BF02666431
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DOI: https://doi.org/10.1007/BF02666431