Publications [#369079] of Stefano Curtarolo

Papers Published

1. Feng, L; Fahrenholtz, WG; Hilmas, GE; Curtarolo, S, Boro/carbothermal reduction co-synthesis of dual-phase high-entropy boride-carbide ceramics, Journal of the European Ceramic Society, vol. 43 no. 6 (June, 2023), pp. 2708-2712 [doi]
   (last updated on 2026/04/04)

   Abstract:
   Dense, dual-phase (Cr,Hf,Nb,Ta,Ti,Zr)B2-(Cr,Hf,Nb,Ta,Ti,Zr)C ceramics were synthesized by boro/carbothermal reduction of oxides and densified by spark plasma sintering. The high-entropy carbide content was about 14.5 wt%. Grain growth was suppressed by the pinning effect of the two-phase ceramic, which resulted in average grain sizes of 2.7 ± 1.3 µm for the high-entropy boride phase and 1.6 ± 0.7 µm for the high-entropy carbide phase. Vickers hardness values increased from 25.2 ± 1.1 GPa for an indentation load of 9.81 N to 38.9 ± 2.5 GPa for an indentation load of 0.49 N due to the indentation size effect. Boro/carbothermal reduction is a facile process for the synthesis and densification of dual-phase high entropy boride-carbide ceramics with both different combinations of transition metals and different proportions of boride and carbide phases.