Authors: Kaufman, Larry Hayes, Fred; Birnie, Dunbar
Source: CALPHAD 5 (1981) 163-184

Abstract: A data base is being developed for calculation of quasi-binary and quasi-ternary phase diagrams of ceramic systems. Previous segments of this base cover combinations of Cr₂O₃, MgO, Al₂O₃, Fe₂O₃, "FeO", SiO₂, CaO, Si₃N₄ and AlN. Lattice Stability, Solution and Compound Phase Parameters were derived covering the liquid, spinel, corundum, periclase, crystobalite, tridymite, quartz, hexagonal and beta prime phases which appear in the binary systems composed of pairs of these compounds (i. e. MgO multiplied by (times) Cr₂O₃) were also characterized. This work extends the data base to cover BeO, Y₂O₃ and Ce₂O₃ additions. Moreover, ternary sections in the SiO₂-MgO-Si₃N₄, SiO₂-Y₂O₃-Si₃N₄ and SiO₂-Ce₂O₃-Si₃N₄ were calculated between 1900 K and 2100 K for comparison with experiment.