Abstract
The activity of barium in liquid Al-Ba alloysX Ba ≤ 0.261) at 1373 K has been determined using the Knudsen effusion-mass loss technique. At higher concentrations (XBa ≥ 0.38), the activity of barium has been determined by the pseudo-isopiestic technique. Activity of aluminum has been derived by Gibbs-Duhem integration. The concentration-concentration structure factor of Bhatia and Thornton[22] at zero wave vector has been computed from the thermodynamic data. The behavior of the mean-square thermal fluctuation in composition indicates a tendency for association in the liquid state. The associated solution model with Al5Ba4 as the predominant complex has been used for the description of the thermodynamic behavior of liquid Al-Ba alloys. Thermodynamic data for the intermetallic compounds in the Al-Ba system and the enthalpy of mixing in liquid alloys have been derived using the phase diagram and the Gibbs’ energy of mixing of liquid alloys.
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Formerly with the Department of Metallurgy, Indian Institute of Science.
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Srikanth, S., Jacob, K.T. Thermodynamics of aluminum-barium alloys. Metall Trans B 22, 607–616 (1991). https://doi.org/10.1007/BF02679015
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DOI: https://doi.org/10.1007/BF02679015