(1. 北方民族大学 材料科学与工程学院，银川 750021；
2. 粉体材料与特种陶瓷省部共建重点实验室，银川 750021；
3. 工业废弃物循环利用及先进材料国际科技合作基地，银川 750021)
摘 要: 采用机械合金化制备了TiNbTaZrAl难熔高熵合金，加入采用放电等离子法制备的Ti(C,N)基金属陶瓷。借助物相分析和形貌表征优化了温度和压力的制备工艺参数。通过XRD、SEM/EDS、TEM、维氏硬度计等对陶瓷进行表征，研究了不同高熵合金加入量对陶瓷的物相、微观组织及力学性能的影响。。结果表明：相比Co黏结剂，TiNbTaZrAl高熵合金的加入可以促进碳化物的固溶和Ti(C,N)晶粒的细化。高熵合金加入量为7.5%(质量分数)时，陶瓷力学性能最优。在优选温度1600 ℃和压力30 MPa的工艺参数下，采用高熵合金黏结剂的Ti(C,N)基金属陶瓷的维氏硬度和断裂韧性，分别达到(1960.4±40) MPa和(10.01±0.25) MPa？m1/2，相比采用Co黏结剂的金属陶瓷分别提升了11.68%和9.28%。
关键字: Ti(C,N)基金属陶瓷；TiNbTaZrAl；难熔高熵合金；力学性能
（1. School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China;
2. Key Laboratory. of Powder Material and Advanced Ceramics, North Minzu University, Yinchuan 750021, China;
3. International Scientific and Technological Cooperation Base of Industrial Waste Recycling and Advanced Materials, North Minzu University, Yinchuan 750021, China）
Abstract:The TiNbTaZrAl refractory high-entropy alloy (HEAs) was prepared by mechanical alloying. The Ti(C,N)-based cermet was sintered by spark plasma method with TiNbTaZrAl HEAs. The process parameters as temperature and pressure were optimized by phase analysis and morphology characterization. The effects of different HEAs contents on the phase composition, microstructures and mechanical properties of Ti(C,N)-based cermet were studied by XRD, SEM/EDS, TEM and Vickers hardness tester. The results show that the addition of TiNbTaZrAl HEAs promotes the solid solution of carbides and grain refinement of Ti(C,N). When the addition of the HEAs reaches 7.5% (mass fraction), the mechanical property is best.The Vickers hardness and fracture toughness of the Ti(C,N)-based cermet with HEAs sintered at 1600 ℃ and 30 MPa are (1960.4±40) MPa and (10.01±0.25) MPa？m1/2. Compared with those of Ti(C,N)-based cermet with Co binder, they are improved by 11.68% and 9.28%, respectively.
Key words: Ti(C,N)-based cermets; TiNbTaZrAl; refractory high entropy alloy; mechanical strength
