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Abstract
A novel method for obtaining the MAX phase Ti2AlC from TiC, Al4C3, and Ti precursors has been demonstrated, involving activation of the mixture in a high-energy ball mill (HEBM) followed by Spark Plasma Sintering (SPS). The phase composition, mechanical characteristics, surface microstructure, and electrochemical behavior in neutral media (0.1 M Na2SO4) of heterogeneous composite ceramic materials TiC/Ti2AlC were studied as a function of sintering temperature (1200–1400 °C). SPS at 1200 °C yields materials with a relative density of 94.42 % and Ti2AlC mass content up to 57 %. These composite materials exhibit capacitive behavior according to cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) data, with a capacitance of 73 mF/g, suggesting their potential application as lead-free ceramic capacitors. Further increase in sintering temperature (1300–1400 °C) leads to increased electrical resistance and enhanced sample homogeneity.
Published Version
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