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Thermodynamic assessment of Mn-Nb and Mn-Ta systems

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VŘEŠŤÁL Jan BROŽ Pavel VLACH Jiří ZELENKA František PAVLŮ Jana MAZALOVÁ Martina ZEMANOVÁ Adéla SMETANA Bedřich YAN Xinlin ROGL Peter Franz

Year of publication 2020
Type Conference abstract
MU Faculty or unit

Faculty of Science

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Description The research of phase equilibria in Mn-Nb and Mn-Ta system has been conducted. In our study, a stable Laves phase was confirmed in both systems, but no other phase was detected experimentally. Melting and transformation temperatures of alloys in both systems were determined by DTA experiments, and this information was supported by phase analysis via scanning electron microscope (SEM) with wavelength dispersive X-ray (WDX) and energy-dispersive X-ray (EDX) analyses. Results of these experiments supported by ab initio calculations and calorimetric measurements of the energy of formation of Laves phases enable us to determine the phase diagrams of both systems by the CALPHAD method.
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