Kinetics of Silicon Carbide Dissolution in Molten Fe–C Alloys

IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Joon Beom Park, Moo Eob Choi, Hyeonwoo Park, Jiwoo Park, Joonho Lee
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Abstract

The dissolution rate of SiC in molten Fe–C alloys was investigated at 1673 ~ 1773 K, while the initial carbon concentration varied from approximately 2–3 wt%. The dissolution of SiC in molten Fe–C alloys occurred to reach the carbon-saturation composition. By assuming a first-order reaction, the dissolution rate constant was estimated to decrease from 8.17 × 10−3 to 2.90 × 10−3 cm/s, as the initial carbon content increased from 2 to 3 wt% at 1673 K. When the temperature increased from 1673 to 1773 K with the sample of the initial carbon content of about 2 wt%, the rate constant increased from 8.17 × 10−3 to 18.41 × 10−3 cm/s. The apparent activation energy was estimated at 199.5 kJ/mol. Based on the experimental results, an empirical equation was suggested for the estimation of the SiC dissolution rate constant: \(\ln k\left( {cm/s} \right) = 12.74 - 1.37 \times \left[ {wt\% C} \right]_{t = 0} - 2.40 \times 10^{4} /T\left( K \right)\), which can be applied to the numerical simulation of the Si-pickup in the FINEX and the Hydrogen-enriched Blast Furnace operations.

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来源期刊
Metals and Materials International
Metals and Materials International 工程技术-材料科学:综合
CiteScore
7.10
自引率
8.60%
发文量
197
审稿时长
3.7 months
期刊介绍: Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.
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