Phase equilibria of the Al2O3-SiO2-CrOx system at 1600 °C and pO2 of 10-10-10-11 atm

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-11
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
6527-6535
Series
Journal of the European Ceramic Society, Volume 43, issue 14
Abstract
The equilibrium phase relations of the Al2O3-SiO2-CrOx system were experimentally studied at 1600 °C and pO2 of 10-10-10-11 atm. The high-temperature isothermal equilibration experiments were conducted in a vertical tube furnace, followed by drop quenching and direct phase composition analysis using an Electron Probe X-ray Microanalyzer. The single liquid equilibria, liquid-solid phase equilibria including liquid-corundum, liquid-mullite, and liquid-cristobalite, as well as the three-phase equilibria of liquid-cristobalite-corundum and liquid-corundum-mullite, were observed. The 1600 °C isothermal sections of the quasi-ternary Al2O3-SiO2-CrOx phase diagram at pO2 of 10-10 and 10-11 atm were constructed. The present experimental results display significant discrepancies with the simulations by MTDATA, FactSage, and Thermo-Calc.
Description
Funding Information: This work was financially supported by Aalto University, School of Chemical Engineering, and the TOCANEM project funded by Business Finland (grant number: 2118452 ). This study utilized the Academy of Finland’s RawMatTERS Finland Infrastructure (RAMI) based at Aalto University, GTK Espoo, and VTT Espoo. Dr. Huahai Mao and Dr. Rui Zhang from Thermo-Calc Software AB, Solna, Sweden, are gratefully acknowledged for their valuable discussion about the calculation. Publisher Copyright: © 2023 The Authors
Keywords
Chromium oxide, Corrosion, Phase diagram, Refractories, Thermodynamics
Other note
Citation
Chen, M, Taskinen, P, Sukhomlinov, D, Lindberg, D, Michallik, R M & Jokilaakso, A 2023, ' Phase equilibria of the Al 2 O 3 -SiO 2 -CrO x system at 1600 °C and pO 2 of 10 -10 -10 -11 atm ', Journal of the European Ceramic Society, vol. 43, no. 14, pp. 6527-6535 . https://doi.org/10.1016/j.jeurceramsoc.2023.06.010