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

Min Chen; Pekka Taskinen; Dmitry Sukhomlinov; Daniel Lindberg; Radoslaw M. Michallik; Ari Jokilaakso

doi:10.1016/j.jeurceramsoc.2023.06.010

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

Min Chen, Pekka Taskinen, Dmitry Sukhomlinov, Daniel Lindberg^*, Radoslaw M. Michallik, Ari Jokilaakso

^*Corresponding author for this work

Geological Survey of Finland

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Abstract

The equilibrium phase relations of the Al₂O₃-SiO₂-CrO_x 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-CrO_x 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.

Original language	English
Pages (from-to)	6527-6535
Number of pages	9
Journal	Journal of the European Ceramic Society
Volume	43
Issue number	14
Early online date	7 Jun 2023
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2023.06.010
Publication status	Published - Nov 2023
MoE publication type	A1 Journal article-refereed

Keywords

Chromium oxide
Corrosion
Phase diagram
Refractories
Thermodynamics

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10.1016/j.jeurceramsoc.2023.06.010Licence: CC BY

CHEM_Chen_et_al_Phase_equilibria_2023_J_Eur_Ceram_SocFinal published version, 6.78 MBLicence: CC BY

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@article{3e9f6c383976495fb2240ef69da7828f,

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

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.",

keywords = "Chromium oxide, Corrosion, Phase diagram, Refractories, Thermodynamics",

author = "Min Chen and Pekka Taskinen and Dmitry Sukhomlinov and Daniel Lindberg and Michallik, {Radoslaw M.} and Ari Jokilaakso",

note = "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{\textquoteright}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: {\textcopyright} 2023 The Authors",

year = "2023",

month = nov,

doi = "10.1016/j.jeurceramsoc.2023.06.010",

language = "English",

volume = "43",

pages = "6527--6535",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

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T1 - Phase equilibria of the Al2O3-SiO2-CrOx system at 1600 °C and pO2 of 10-10-10-11 atm

AU - Chen, Min

AU - Taskinen, Pekka

AU - Sukhomlinov, Dmitry

AU - Lindberg, Daniel

AU - Michallik, Radoslaw M.

AU - Jokilaakso, Ari

N1 - 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

PY - 2023/11

Y1 - 2023/11

N2 - 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.

AB - 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.

KW - Chromium oxide

KW - Corrosion

KW - Phase diagram

KW - Refractories

KW - Thermodynamics

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DO - 10.1016/j.jeurceramsoc.2023.06.010

M3 - Article

AN - SCOPUS:85161312563

SN - 0955-2219

VL - 43

SP - 6527

EP - 6535

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 14

ER -

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

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

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