Abstract
The phase diagram of CaO-Al2O3-Ti2O3 system has significant implications for the metallurgical slag design of Al-Ti alloy steel. In this work, the high-temperature equilibrium experiments were conducted at 1500 °C and 1600 °C in C/CO equilibrium atmosphere, respectively. The types and compositions of the equilibrium phases were determined by Electron Probe Micro Analysis (EPMA) and X-ray diffraction (XRD). The isothermal section of CaO-Al2O3-Ti2O3 system in the low w(TiOx) region at 1500 °C was constructed for the first time, in which there are 6 three-phase fields, 7 two-phase fields, and a liquid phase field. The isothermal section of CaO-Al2O3-Ti2O3 system in the low w(TiOx) region at 1600 °C was constructed and revised, including 3 three-phase fields, 6 two-phase fields, and a liquid phase field. Additionally, under the current experimental condition, the reasons for the formation of TiC in the high w(TiOx) region of this slag system were analyzed, further discussing the effect of carbon on the phase equilibria of CaO-Al2O3-Ti2O3 system.
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