Phase Equilibria in the ZnO-‘‘FeO’’-SiO System in Reducing Atmosphere and in the ZnO-‘‘FeO’’- SiO -‘‘Cu O’’ System in Equilibrium with Liquid 2 2 Copper Metal at 1250 C (1523 K) TAUFIQ HIDAYAT, PETER C. HAYES, and EVGUENI JAK Recent experimental studies in the ZnO-‘‘FeO’’-SiO system in reducing atmosphere demonstrated signiﬁcant discrepancies with the current FactSage thermodynamic model developed using previous experimental data in this system in equilibrium with metallic iron and air. The present experimental study on phase equilibria in the ZnO-‘‘FeO’’-SiO -‘‘Cu O’’ 2 2 system in equilibrium with liquid copper at 1250 C (1523 K) at low copper oxide concentrations in slag was initiated and undertaken to resolve these discrepancies. A high-temperature equilibration–rapid quenching–electron-probe X-ray microanalysis (EPMA) technique using a primary phase substrate support and closed system approach with Cu metal introduced to determine eﬀective equilibrium oxygen partial pressure from the Cu /Cu O metal 2 slag equilibria was applied to provide accurate information on the liquidus and corresponding solid compositions in the spinel, willemite, and tridymite primary phase ﬁelds. The present results conﬁrmed the accuracy of the FactSage model, resolved discrepancies, and demonstrated signiﬁcant uncertainties in the recent studies by other authors on the system in
Metallurgical and Materials Transactions B – Springer Journals
Published: May 31, 2018
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