Thermodynamic and practical study of iron silicon phases that can be produced from iron and silicon powder systems

مهندسی متالورژی و مواد

Article 11, Volume 33, Issue 2 - Serial Number 26, September 2022, Pages 161-172   

Document Type: Original Articles

DOI: 10.22067/jmme.2022.75661.1043

Author

Razieh Khoshhal^*

Department of Materials and Metallurgical Engineering, Birjand University of Technology, Birjand, Iran.

Abstract

Through the reaction of iron and silicon powder system, different types of iron silicides can form. Depending on their structure, the iron silicide exhibit metallic, semiconductor, or insulating behavior. The higher the iron contents of these materials, the stronger their magnetic properties. One of the technical problems in using elemental powder to produce the different types of silicides is predicting the final component of iron silicide. So far, no comprehensive research has been conducted on this goal. Therefore, in this study, based on the thermodynamic data and with the help of HSC software, the iron silicon phases will form in each molar ratio of iron and silicon were predicted. Then, three different molar ratios were examined in the laboratory for practical evaluation of this prediction. The results showed that by increasing the molar ratio of silicon from 0.5 to 1 and 2, respectively, the Fe3Si, FeSi, and FeSi2 phases will be the predominant phases, which almost agreed with the actual thermodynamic predictions. The reasons for the differences were also discussed.

Keywords

Iron silicon; Thermodynamics; Iron; Silicon; Powder system

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