Investigation of Effects of SiO2 Content and Cooling Rate on Crystallization in Fe2O3-CaO-SiO2 System Using In Situ Confocal Laser Scanning Microscopy

Tae Jun Park; Joon Sung Choi; Dong Joon Min

doi:10.1007/s11663-019-01518-y

Investigation of Effects of SiO₂ Content and Cooling Rate on Crystallization in Fe₂O₃-CaO-SiO₂ System Using In Situ Confocal Laser Scanning Microscopy

Tae Jun Park, Joon Sung Choi, Dong Joon Min

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The crystallization behaviors of the Fe₂O₃-CaO-SiO₂ system in a non-equilibrium state with various chemical compositions and cooling rates were investigated by confocal laser scanning. Equilibrium samples were prepared in melt states and cooled at a rate of 1 K/min to produce samples in quasi-equilibrium states. The effect of SiO₂ on the phase constitution was investigated using Image Analyzer, and the changes of the phase ratios were analyzed using activity values of Fe₂O₃ calculated using FactSage 7.1. The Continuous cooling transformation diagram of the Fe₂O₃-CaO-SiO₂ system was obtained for various cooling rates. The temperatures at which the primary phase formed for various SiO₂ contents and cooling rates differed from the equilibrium temperatures, and the phase-formation temperature ranges varied with the cooling rate. In addition, the reduction degree of each sample was measured to determine the effect of SiO₂ content and cooling rate on the Fe₂O₃-CaO-SiO₂ system. The reduction degree in the FeO₃-CaO-SiO₂ system is dominantly influenced by the SiO₂ bond-phase morphology (CF, C₂S, C₃S, or glass) rather than the cooling rate.

Original language	English
Pages (from-to)	790-798
Number of pages	9
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	50
Issue number	2
DOIs	https://doi.org/10.1007/s11663-019-01518-y
Publication status	Published - 2019 Apr 15

Bibliographical note

Publisher Copyright:
© 2019, The Minerals, Metals & Materials Society and ASM International.

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/s11663-019-01518-y

Cite this

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title = "Investigation of Effects of SiO2 Content and Cooling Rate on Crystallization in Fe2O3-CaO-SiO2 System Using In Situ Confocal Laser Scanning Microscopy",

abstract = "The crystallization behaviors of the Fe2O3-CaO-SiO2 system in a non-equilibrium state with various chemical compositions and cooling rates were investigated by confocal laser scanning. Equilibrium samples were prepared in melt states and cooled at a rate of 1 K/min to produce samples in quasi-equilibrium states. The effect of SiO2 on the phase constitution was investigated using Image Analyzer, and the changes of the phase ratios were analyzed using activity values of Fe2O3 calculated using FactSage 7.1. The Continuous cooling transformation diagram of the Fe2O3-CaO-SiO2 system was obtained for various cooling rates. The temperatures at which the primary phase formed for various SiO2 contents and cooling rates differed from the equilibrium temperatures, and the phase-formation temperature ranges varied with the cooling rate. In addition, the reduction degree of each sample was measured to determine the effect of SiO2 content and cooling rate on the Fe2O3-CaO-SiO2 system. The reduction degree in the FeO3-CaO-SiO2 system is dominantly influenced by the SiO2 bond-phase morphology (CF, C2S, C3S, or glass) rather than the cooling rate.",

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Investigation of Effects of SiO₂ Content and Cooling Rate on Crystallization in Fe₂O₃-CaO-SiO₂ System Using In Situ Confocal Laser Scanning Microscopy. / Park, Tae Jun; Choi, Joon Sung; Min, Dong Joon.
In: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, Vol. 50, No. 2, 15.04.2019, p. 790-798.

Research output: Contribution to journal › Article › peer-review

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AB - The crystallization behaviors of the Fe2O3-CaO-SiO2 system in a non-equilibrium state with various chemical compositions and cooling rates were investigated by confocal laser scanning. Equilibrium samples were prepared in melt states and cooled at a rate of 1 K/min to produce samples in quasi-equilibrium states. The effect of SiO2 on the phase constitution was investigated using Image Analyzer, and the changes of the phase ratios were analyzed using activity values of Fe2O3 calculated using FactSage 7.1. The Continuous cooling transformation diagram of the Fe2O3-CaO-SiO2 system was obtained for various cooling rates. The temperatures at which the primary phase formed for various SiO2 contents and cooling rates differed from the equilibrium temperatures, and the phase-formation temperature ranges varied with the cooling rate. In addition, the reduction degree of each sample was measured to determine the effect of SiO2 content and cooling rate on the Fe2O3-CaO-SiO2 system. The reduction degree in the FeO3-CaO-SiO2 system is dominantly influenced by the SiO2 bond-phase morphology (CF, C2S, C3S, or glass) rather than the cooling rate.

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