Tohoku University · Materials Science
Professor Dmytro Demirskyi's research lab specializes in the design, synthesis, and characterization of advanced ultra-high temperature ceramics (UHTCs) and eutectic composites using advanced consolidation techniques such as spark plasma sintering (SPS). The lab focuses on developing medium-entropy and high-entropy carbides and borides with enhanced mechanical properties, including high flexural strength and fracture toughness, for extreme environment applications. Key research directions include in situ formation of eutectic microstructures, phase stability at elevated temperatures, and tailoring microstructure through processing parameters like pressure and temperature.
Figures are computed from collected data and may differ slightly.
In this study, we explore a simple and effective method for producing a quaternary solid-solution of carbides, a medium-entropy (Ti1/4Ta1/4Zr1/4Nb1/4)C. Using commercially-available carbide powders with an equimolar ratio and performing spark plasma consolidation at 1927 °C and 1977 °C, we demonstrated that the phase formation and high-temperature flexural strength can be controlled using the processing conditions. The flexural strength and fracture toughness at room temperature were reached a
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