# Thermodynamics of Aluminum-Barium Alloys

Srikanth, S and Jacob, KT (1991) Thermodynamics of Aluminum-Barium Alloys. In: Metallurgical and Materials Transactions B, 22 (5). pp. 606-616.

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## Abstract

The activity of barium in liquid Al-Ba alloys $(X_{Ba}\leq 0.261)$ at 1373 K has been determined using the Knudsen effusion-mass loss technique. At higher concentrations $(X_{Ba}\geq 0.38)$, 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 $Al_5Ba_4$ 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.

Item Type: Journal Article Copyright of this article belongs to Springer. Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) 25 Sep 2007 19 Sep 2010 04:39 http://eprints.iisc.ernet.in/id/eprint/11887