A high-entropy alloy (HEA), CoCrFeNiMn0.5Ti0.5, is used as a sintering aid for the densification of TiB2 sintered by spark plasma sintering. The HEA content in the starting TiB2-HEA mixture is varied from 0 to 10 wt-%. The microstructure and mechanical properties of the sintered samples are analysed and the optimum HEA content of 10% is found for the preparation of the TiB2-HEA ceramics, allowing combining high mechanical properties (Vickers hardness of 2174.64 HV and flexural strength of 427.69 MPa) and high relative density of 99.1%.
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