Investigation of Effects of SiO{sub 2} Content and Cooling Rate on Crystallization in Fe{sub 2}O{sub 3}-CaO-SiO{sub 2} System Using In Situ Confocal Laser Scanning Microscopy

Journal Article · Mon Apr 15 04:00:00 EDT 2019 · Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/S11663-019-01518-Y· OSTI ID:22933644

Park, Tae Jun; Choi, Joon Sung

The crystallization behaviors of the Fe{sub 2}O{sub 3}-CaO-SiO{sub 2} 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 SiO{sub 2} on the phase constitution was investigated using Image Analyzer, and the changes of the phase ratios were analyzed using activity values of Fe{sub 2}O{sub 3} calculated using FactSage 7.1. The Continuous cooling transformation diagram of the Fe{sub 2}O{sub 3}-CaO-SiO{sub 2} system was obtained for various cooling rates. The temperatures at which the primary phase formed for various SiO{sub 2} 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 SiO{sub 2} content and cooling rate on the Fe{sub 2}O{sub 3}-CaO-SiO{sub 2} system. The reduction degree in the FeO{sub 3}-CaO-SiO{sub 2} system is dominantly influenced by the SiO{sub 2} bond-phase morphology (CF, C{sub 2}S, C{sub 3}S, or glass) rather than the cooling rate.

• OSTI ID: 22933644
• Journal Information: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science Journal Issue: 2 Vol. 50; ISSN 1073-5615; ISSN MTBSEO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM OXIDES
CHEMICAL COMPOSITION
COOLING
CRYSTALLIZATION
IMAGE PROCESSING
IRON OXIDES
LASERS
MICROSCOPY
MORPHOLOGY
SILICON OXIDES
TEMPERATURE RANGE