Two-phase fully dense high entropy carbide (HEC) cermets were successfully prepared following the conventional cemented carbide/cermet processing route. Cold isostatically pressed equimolar TiC, VC, NbC, TaC and WC powder mixtures with 12 vol% Ni binder were pressureless sintered in the solid state and liquid phase sintering regimes respectively. A homogeneous rock-salt (space group $\mathit{Fm}\overline{3}\mathit{m}$) HEC phase embedded in a nickel alloy binder was attained by liquid phase sintering at 1420°C. Thermodynamic simulations were conducted to predict the equilibrium phases and carbide/binder phase contents. The phase evolution was investigated at seven different sintering temperatures in the 900–1420°C window. Thermogravimetry and differential scanning calorimetry analysis were performed to follow up the sintering process. Electron probe microanalysis was used to map the elemental distribution as well as to quantify the constituent phase contents. Nanoindentation were performed to correlate the difference in mechanical properties of the core-rim structured HEC grains with the chemical composition. The liquid phase sintered (Ti,V,Nb,Ta,W)C - 12 vol% Ni had a Vickers hardness of 14.3 GPa and Palmqvist indentation fracture toughness of 9.2 MPa. m^1/2.

按照传统的硬质合金/金属陶瓷加工路线，成功制备了两相全致密高熵碳化物（HEC）金属陶瓷。冷等静压等摩尔 TiC、VC、NbC、TaC 和 WC 粉末混合物与 12 vol% Ni 粘合剂分别在固态和液相烧结状态下进行无压烧结。均质岩盐（空间群$\mathit{调频}\overline{3}\mathit{米}$) 通过在 1420°C 的液相烧结获得嵌入镍合金粘合剂中的 HEC 相。进行热力学模拟以预测平衡相和碳化物/粘合剂相含量。在 900-1420°C 窗口中的七种不同烧结温度下研究相演变。进行热重分析和差示扫描量热分析以跟踪烧结过程。电子探针微量分析用于绘制元素分布图以及量化组成相含量。进行纳米压痕以将核心边缘结构的 HEC 晶粒的机械性能差异与化学成分相关联。液相烧结 (Ti,V,Nb,Ta,W)C - 12 vol% Ni 的维氏硬度为 14.3 GPa，Palmqvist 压痕断裂韧性为 9.2 MPa。米^1/2。