The single-phase (Hf_0.2Mo_0.2Nb_0.2Ta_0.2Ti_0.2)C ceramics with uniform composition have been prepared by spark plasma sintering. The microstructure, mechanical and tribological properties were studied. The experimental results indicate that grain size and densification degree determine their mechanical properties. Meanwhile, the high temperature deteriorates their hardness and fracture toughness. The HEC3 sintered at 2000 °C exhibits excellent mechanical properties and wear resistance. Its hardness and fracture toughness are 18.5 GPa and 4.2 MPam^1/2 at 25 °C, respectively. And its wear rate is as low as 10⁻⁵-10⁻⁷ mm³/Nm at 25–600 °C. The outstanding wear resistance benefits from the synergistic effect of the generated tribo-film and excellent mechanical properties. This material is expected to be a novel kind of high-temperature materials for tribological application.

通过火花等离子体烧结制备了组成均匀的单相（Hf _0.2 Mo _0.2 Nb _0.2 Ta _0.2 Ti _0.2）C陶瓷。研究了组织，力学和摩擦学性能。实验结果表明，晶粒尺寸和致密化程度决定了它们的力学性能。同时，高温降低了它们的硬度和断裂韧性。在2000°C下烧结的HEC3具有出色的机械性能和耐磨性。 在25°C下的硬度和断裂韧性分别为18.5 GPa和4.2 MPam ^1/2。其磨损率低至10 ^-5 -10 ^-7 mm ³/ Nm在25–600°C下。优异的耐磨性得益于所产生的摩擦膜的协同作用和出色的机械性能。预期该材料是摩擦学应用的新型高温材料。