Abstract
Equilibrium oxygen pressures of the univariant ternary coexistences hematite + spinel + alumina, alloy + wustite + spinel, and alloy + spinel + alumina were determined at temperatures in the range 1123 to 1423 K using solid state electrochemical cells. The compositions of alloys and oxide phases of this Fe-Al-0 system that equilibrated with one another at 1273, 1423, and 1573 K were determined. These results and those from the literature are used to determine stabilities of the ternary oxide phases as a function of oxygen pressure and composition by constructing equilibrium oxygen pressure diagrams at 1073, 1173, and 1273 K.
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Elrefaie, F.A., Smeltzer, W.W. Thermodynamics of the system iron-aluminum-oxygen between 1073 K and 1573 K. Metall Trans B 14, 85–93 (1983). https://doi.org/10.1007/BF02670873
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DOI: https://doi.org/10.1007/BF02670873