Thermodynamic evaluation of the Al-H system

Caian Qiu*, Gregory B. Olson, Susanne M. Opalka, Donald L. Anton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


The thermodynamic properties of the Al-H system were assessed using models for the Gibbs energy of the individual phases, including the metastable hydride AlH 3 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 fee Al can be described very well with a regular solution model for liquid and fee. 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.

Original languageEnglish (US)
Pages (from-to)520-527
Number of pages8
JournalJournal of Phase Equilibria and Diffusion
Issue number6
StatePublished - Dec 2004

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry


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