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

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1 Citation (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 languageEnglish
Pages (from-to)790-798
Number of pages9
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume50
Issue number2
DOIs
Publication statusPublished - 2019 Apr 15

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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