Simultaneous Differential Thermal Analysis and Thermogravimetric Analysis of Si-30B Alloy

This article focuses on the experimental determination of the transformation temperature of Si-30B alloy in the temperature range of 25-1820 °C in a flowing gas atmosphere (He, 99.9992%) carried out by simultaneous differential thermal analysis and thermogravimetric analysis (DTA–TG) using a graphit...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2020-11, Vol.29 (11), p.7073-7079
Main Authors: Homa, M., Sobczak, N., Hodor, K., Gezgin, S.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Tribology
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Summary:This article focuses on the experimental determination of the transformation temperature of Si-30B alloy in the temperature range of 25-1820 °C in a flowing gas atmosphere (He, 99.9992%) carried out by simultaneous differential thermal analysis and thermogravimetric analysis (DTA–TG) using a graphite container. The DTA curve during heating showed the presence of two critical temperatures, i.e., T  = 1380.7 °C and T  = 1532.0 °C. The first one corresponds to the melting point of a eutectic system (Si + SiB 6 ). The high-temperature interaction and reactivity between the alloy and the container during DTA–TG test were evaluated by scanning electron microscopy coupled with energy-dispersive x-ray analysis. The results have demonstrated that the graphite container reacts with both liquid silicon and boron dissolved in liquid constituent of the alloy to form SiC and B 4 C, respectively.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-020-05157-2