The influence of metal element types on the formation mechanism and properties of high-entropy ceramic powders and coatings

High entropy carbide ceramics, known for their single-phase formation and tunable properties, have seen limited research on regulating the performance of powders and coatings through elemental changes. This study focused on how different elements affect high entropy phase. Two reaction systems were established using precursors Ta2O5, ZrO2, Nb2O5, TiO2, V2O5, MoO3, and carbon black to explore the impact of two elements on the formation of high-entropy carbide. The (TaZrTiNbV)C and (TaMoTiNbV)C dense coatings were prepared by plasma spraying. The influences of two elements (Zr and Mo) on the phase, microstructure, property, and formation mechanism of the coating were analyzed. The (TaZrTiNbV)C coating showing a hardness of 1762 HV0.1 and a toughness of 3.1 MPa & sdot;m1/2, which were attributed to the presence of finely-grained (TaZrTiNbV)C particles.