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Thermodynamic evaluation of the Al-H system

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Abstract

The thermodynamic properties of the Al-H system were assessed using models for the Gibbs energy of the individual phases, including the metastable hydride AlH3 phase. The model parameters were obtained through optimization by best fitting to selected experimental data. Particular attention was paid to hydrogen solubility in liquid and face-centered-cubic (fcc) Al. It was shown that the hydrogen can be treated as an ideal gas under normal conditions. The hydrogen solubility in liquid and fcc Al can be described very well with a regular solution model for liquid and fcc. The present calculations show satisfactory agreement with most experimental data for hydrogen solubility in fcc Al and selected data for hydrogen solubility in liquid Al, qualifying the extension of this binary model to higher-order Al-H-bearing systems.

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Authors and Affiliations

  1. QuesTek Innovations LLC, 1820 Ridge Ave., 60201, Evanston, Illinois

    Caian Qiu & Gregory B. Olson

  2. Department of Materials Science and Engineering, Northwestern University, 60201, Evanston, Illinois

    Gregory B. Olson

  3. United Technology Research Center, 411 Silver Lane, 06084, East Hartford, Connecticut

    Susanne M. Opalka & Donald L. Anton

Authors
  1. Caian Qiu
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  2. Gregory B. Olson
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  3. Susanne M. Opalka
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  4. Donald L. Anton
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Qiu, C., Olson, G.B., Opalka, S.M. et al. Thermodynamic evaluation of the Al-H system. J Phs Eqil and Diff 25, 520–527 (2004). https://doi.org/10.1007/s11669-004-0065-1

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  • DOI: https://doi.org/10.1007/s11669-004-0065-1

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