NbC based cermets with CoCrFeNiMn high-entropy alloys (HEAs) binders were fabricated by powder metallurgy. The effects of sintering temperatures on the microstructure and mechanical properties of NbC-HEAs cermets were systematically examined. The results show that the relative densities of NbC-HEAs sintered at different temperatures were about 90%. The XRD shows that a brittle M₂₃C₆ (M = Cr, Co, Fe, Ni) phase was detected in the cermets. The average particle size of NbC increased with increasing the sintering temperature. The coarsening of NbC particles caused the decrease of hardness and transverse bending strength (TRS) of the cermets. The highest TRS (497 MPa) was obtained for the cermet sintered at 1400 °C. The calculated activation energy was 696.6 kJ/mol, which was much higher than those in single element binders. Large cracks were observed for the cermets sintered at high temperatures, which suggested grain coarsening could reduce the toughness of cermets.

通过粉末冶金法制备了具有CoCrFeNiMn高熵合金（HEAs）粘结剂的NbC基金属陶瓷。系统地研究了烧结温度对NbC-HEA金属陶瓷的微观结构和力学性能的影响。结果表明，在不同温度下烧结的NbC-HEA的相对密度约为90％。X射线衍射显示脆性M ₂₃ C ₆在金属陶瓷中检测到（M = Cr，Co，Fe，Ni）相。NbC的平均粒径随烧结温度的升高而增加。NbC颗粒的粗化导致金属陶瓷的硬度和横向弯曲强度（TRS）降低。在1400°C下烧结的金属陶瓷获得最高的TRS（497 MPa）。计算出的活化能为696.6 kJ / mol，远高于单元素粘结剂的活化能。在高温下烧结的金属陶瓷中观察到大的裂纹，这表明晶粒粗化会降低金属陶瓷的韧性。