Thermodynamics of aluminum-barium alloys

Srikanth, S. ; Jacob, K. T. (1991) Thermodynamics of aluminum-barium alloys Metallurgical and Materials Transactions B, 22 (5). pp. 607-616. ISSN 1073-5615

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The activity of barium in liquid Al-Ba alloys (XBa ≤ 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.

Item Type:Article
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ID Code:12940
Deposited On:11 Nov 2010 08:22
Last Modified:16 May 2016 22:11

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