The Effect of Graphite on the Iron-Silicide Compound Formation

Khoshhal, Razieh; Alavi Nezhad Khalil Abad, Seyed Vahid

doi:10.22068/ijmse.3082

Volume 20, Issue 1 (March 2023) IJMSE 2023, 20(1): 1-8 | Back to browse issues page

‎ 10.22068/ijmse.3082

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Khoshhal R, Alavi Nezhad Khalil Abad S V. The Effect of Graphite on the Iron-Silicide Compound Formation. IJMSE 2023; 20 (1) :1-8
URL: http://ijmse.iust.ac.ir/article-1-3082-en.html

The Effect of Graphite on the Iron-Silicide Compound Formation

Razieh Khoshhal

, Seyed Vahid Alavi Nezhad Khalil Abad

Abstract: (6937 Views)

In this article, the effect of graphite on iron-silicon interactions was investigated. It was found that, as graphite enters the iron structure, it permits further development of iron-silicon reactions. It was found that in the stoichiometric ratio of 1:0.5 of iron and silicon, when graphite is added to the system, simultaneously with the reaction of iron and silicon to form Fe₃Si₅, some amount of carbon can be dissolved in the iron and lead to more diffusion in iron and more iron silicide production. Silicon also reacts with carbon and produces SiC. The more amount of carbon entered into the system, the more growth of SiC occurs, while the production of other iron silicide phases, namely FeSi and Fe₃Si preceded. Finally diffused carbon into the iron reaches a definite amount that can form Fe₃C. In the stoichiometric ratio of 1:1 of iron and silicon, the formation of FeSi and SiC phases is observable. At the same time, the diffusion of carbon occurs in the same as the previous stoichiometric ratio. In the stoichiometric ratio of 1:2 of iron and silicon, compared with the stoichiometric ratio of 1:1, a larger amount of silicon is available and, the FeSi₂ phase can form in addition to FeSi