中文摘要：

采用放电等离子技术（SPS）烧结制备出纳米复合Ti（C，N）基金属陶瓷材料。用光学显微镜、扫描电镜和能谱仪等对烧结体的孔隙率、微观组织和断口形貌等进行了观察，并对不同条件下材料的力学性能进行了对比分析。结果表明：直接升温到1250℃保温8min可获得较好的力学性能；在显微结构中，除了黑芯／白环的结构外，还存在着白芯／黑环结构；孔洞和大颗粒硬质相为主要的断裂源，断裂方式以沿晶断裂为主，同时存在着解理断裂和穿晶断裂。

英文摘要：

OM, SEM, EDX and other techniques were used to analyze the porosity, microstructure and fractography of nano-composite Ti（C, N）-hased cermets produced by spark plasma sintering（SPS）. The mechanical properties of Ti（C, N）-hased cermets produced in different conditions were discussed. At 1 250℃ for 8min by elevating directly, fairly good mechanical performance could be obtained. Except the microstructure of black core/ white rim, white core/black rim was also presented, which resulted from the existence of nano-powders which changed the evolution of microstructure. The fracture mainly originated from cavities and the intergranular fracture was the leading fracture mode, besides the cleavage fracture and transgranular fracture.