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Thermodynamic study of liquid aluminum-magnesium alloys by vapor pressure measurements

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Abstract

Thermodynamic properties of liquid Al-Mg alloys have been determined by vapor pressure measurements over pure liquid magnesium and liquid Al-Mg alloys, in the composition range of 5 to 94 at. pct magnesium between 900 and 1245 K, employing transpiration technique. The results obtained have been compared with those reported by earlier workers and possible reasons for the observed inconsistencies have been discussed. The present investigations indicate that the liquid Al-Mg system nearly conforms to ideal solution behavior, with slight negative deviation. The minimum activity coefficient value for magnesium and the maximum integral molar heat of solution for the alloy have been found to be equal to 0.6 at 10 at. pct and -2.49 kJ/g atom at 50 at. pct magnesium respectively at 1000 K.

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Authors and Affiliations

  1. Metallurgy Division, Bhabha Atomic Research Centre, 400085, Trombay, Bombay, India

    Y. J. Bhatt (Scientific Officer) & S. P. Garg (Scientific Officer)

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  1. Y. J. Bhatt
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  2. S. P. Garg
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Bhatt, Y.J., Garg, S.P. Thermodynamic study of liquid aluminum-magnesium alloys by vapor pressure measurements. Metall Trans B 7, 271–275 (1976). https://doi.org/10.1007/BF02654926

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