Kinetics of SiC Formation on Graphite Using N2-CO-SiO and N2-CO-H2-SiO Gas Mixtures

Joon Seok Oh; Joonho Lee

doi:10.1007/s11663-019-01598-w

Kinetics of SiC Formation on Graphite Using N₂-CO-SiO and N₂-CO-H₂-SiO Gas Mixtures

Joon Seok Oh
, Joonho Lee^*

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

The formation of SiC on a graphite surface through the reaction between SiO gas and C was investigated. Experiments were conducted at 1843 K, 1873 K, and 1903 K (1570 °C, 1600 °C, and 1630 °C) under N₂-CO-SiO or N₂-CO-H₂-SiO gas mixture atmospheres. The formation rate of SiC on the graphite increased with the increasing temperature and with the decreasing partial pressure of CO gas. The forward (k_f) and backward (k_b) reaction rate constants of SiC formation with SiO gas were obtained as follows: ln k_f(mol / c m ²· s · atm) = 29.175 - 76 , 083 / T ln k_b(mol / c m ²· s · atm) = 53.518 - 129 , 072 / T Under the N₂-CO-H₂-SiO gas mixture atmosphere, the formation rate of SiC on the graphite increased. It was observed that the formation of SiC whiskers was enhanced by the catalytic reaction in liquid Fe-based nanodroplets.

Original language	English
Pages (from-to)	1808-1813
Number of pages	6
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	50
Issue number	4
DOIs	https://doi.org/10.1007/s11663-019-01598-w
Publication status	Published - 2019 Aug 15

Bibliographical note

Funding Information:
This study was supported by the Industrial Strategic Technology Development Program (20172010106300, Development of hybrid ironmaking processes for lower CO 2 emissions) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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10.1007/s11663-019-01598-w

Cite this

@article{fb8d4d44f2a14126b8b6a8485fc2d029,

title = "Kinetics of SiC Formation on Graphite Using N2-CO-SiO and N2-CO-H2-SiO Gas Mixtures",

abstract = "The formation of SiC on a graphite surface through the reaction between SiO gas and C was investigated. Experiments were conducted at 1843 K, 1873 K, and 1903 K (1570 °C, 1600 °C, and 1630 °C) under N2-CO-SiO or N2-CO-H2-SiO gas mixture atmospheres. The formation rate of SiC on the graphite increased with the increasing temperature and with the decreasing partial pressure of CO gas. The forward (kf) and backward (kb) reaction rate constants of SiC formation with SiO gas were obtained as follows: ln kf(mol / c m 2· s · atm) = 29.175 - 76 , 083 / T ln kb(mol / c m 2· s · atm) = 53.518 - 129 , 072 / T Under the N2-CO-H2-SiO gas mixture atmosphere, the formation rate of SiC on the graphite increased. It was observed that the formation of SiC whiskers was enhanced by the catalytic reaction in liquid Fe-based nanodroplets.",

author = "Oh, \{Joon Seok\} and Joonho Lee",

note = "Funding Information: This study was supported by the Industrial Strategic Technology Development Program (20172010106300, Development of hybrid ironmaking processes for lower CO 2 emissions) funded by the Ministry of Trade, Industry \& Energy (MOTIE, Korea). Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Publisher Copyright: {\textcopyright} 2019, The Minerals, Metals \& Materials Society and ASM International.",

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AU - Lee, Joonho

N1 - Funding Information: This study was supported by the Industrial Strategic Technology Development Program (20172010106300, Development of hybrid ironmaking processes for lower CO 2 emissions) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Publisher Copyright: © 2019, The Minerals, Metals & Materials Society and ASM International.

PY - 2019/8/15

Y1 - 2019/8/15

N2 - The formation of SiC on a graphite surface through the reaction between SiO gas and C was investigated. Experiments were conducted at 1843 K, 1873 K, and 1903 K (1570 °C, 1600 °C, and 1630 °C) under N2-CO-SiO or N2-CO-H2-SiO gas mixture atmospheres. The formation rate of SiC on the graphite increased with the increasing temperature and with the decreasing partial pressure of CO gas. The forward (kf) and backward (kb) reaction rate constants of SiC formation with SiO gas were obtained as follows: ln kf(mol / c m 2· s · atm) = 29.175 - 76 , 083 / T ln kb(mol / c m 2· s · atm) = 53.518 - 129 , 072 / T Under the N2-CO-H2-SiO gas mixture atmosphere, the formation rate of SiC on the graphite increased. It was observed that the formation of SiC whiskers was enhanced by the catalytic reaction in liquid Fe-based nanodroplets.

AB - The formation of SiC on a graphite surface through the reaction between SiO gas and C was investigated. Experiments were conducted at 1843 K, 1873 K, and 1903 K (1570 °C, 1600 °C, and 1630 °C) under N2-CO-SiO or N2-CO-H2-SiO gas mixture atmospheres. The formation rate of SiC on the graphite increased with the increasing temperature and with the decreasing partial pressure of CO gas. The forward (kf) and backward (kb) reaction rate constants of SiC formation with SiO gas were obtained as follows: ln kf(mol / c m 2· s · atm) = 29.175 - 76 , 083 / T ln kb(mol / c m 2· s · atm) = 53.518 - 129 , 072 / T Under the N2-CO-H2-SiO gas mixture atmosphere, the formation rate of SiC on the graphite increased. It was observed that the formation of SiC whiskers was enhanced by the catalytic reaction in liquid Fe-based nanodroplets.

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