Metastable eutectic, gas to solid, condensation in the FeO-Fe_2O_3-SiO_2 system

摘要

Non-equilibrium gas to solid condensation produced three distinct groupings of ferrosilica solids with compositions approx 15, 30 and 87.5 wt.% FeO (or, approx 17, 33 and 97 wt.% Fe_2O_3). These solid compositions define metastable eutectic points in the FeO-Fe_2O_3-SiO_2 binary system. The position of a silica-rich metastable eutectic is sensitive to the ratio FeO: Fe_2O_3 during gas-to-solid quenching. The Fe-rich metastable eutectic indicates a two-liquid field in this revised pseudo-binary equilibrium phase diagram.