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Synthesis and properties of transition metal carbides
Nedvědová Šolcová, Pavlína ; Tyrpekl, Václav (advisor) ; Zákutná, Dominika (referee)
This master thesis is a follow-up of my bachelor's project, where the goal was to prepare high entropy carbide (HEC), namely (Ti, Zr, Hf, Nb, Ta)C, by the sol-gel method followed by carbothermal reduction using spark plasma sintering facility (SPS). In this work, the first aim is to substitute SPS with ultra-fast high-temperature sintering (UHS) for the same HEC, (Ti, Zr, Hf, Nb, Ta)C. The advantages of UHS compared to SPS are a thousand times lower consumption of electricity and simpler set-up. The second aim is the adaptation of the synthesis for the preparation of HEC of different compositions, (Cr, Mn, Fe, Co, Ni)C. The third aim is the testing of the presented sol-gel technique on the production of borides, while the initial experiments were focused on boro- carbothermal reduction. Keywords: high entropy carbides, high entropy borides, transition metals, carbothermal reduction, high-temperature ceramics, sol-gel method
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