标题：Study on the hot pressing technology of ZrO2-TiC-Al2O3 nanocomposite ceramic tool and die material
作者：Zhao, Shi-Kui ;Xu, Chong-Hai
作者机构：[Zhao, Shi-Kui ;Xu, Chong-Hai ] School of Mechanical Engineering, Shandong Institute of Light Industry, Jinan, China;[Xu, Chong-Hai ] School of Mechan 更多
来源：Journal of Harbin Institute of Technology (New Series)
关键词：Ceramic tool and die material; Hot pressing technology; Mechanical properties; Nanocomposite
摘要：Development of new ceramic tool and die material is one of the important topics in the field of tool and die research. A new ZrO2-TiC-Al2O3 nanocomposite ceramic tool and die material was prepared with hot pressing technology. The effects of sintering temperature and holding time on the microstructure and mechanical properties were investigated, and the fracture morphology was investigated by scanning electron microscope. Results show that, when the holding time remains at 40 min, with the increase of the sintering temperature, the flexural strength increases and then decreases, reaching the maximum of 773 MPa when sintered at 1460°C. The fracture toughness hardly changes after 1460°C. The sintering temperature has little effect on the hardness. When the hot pressing temperature remains at 1500°C, with the increase of the holding time, the flexural strength increases, reaching the maximum of 752 MPa when sintered for 50 min, while the fracture toughness first decreases and then increases, the hardness slightly decreases. Through the comprehensive comparison of each mechanical properties of the material, ZrO2-TiC-Al2O3 nanocomposite ceramic tool and die material with optimum mechanical properties can be achieved when the hot pressing temperature is 1460°C and the holding time is 50 min.