Influences of Sintering Process on the Microstructure and Mechanical Behavior of ZrO_2 Nano-composite Ceramic Tool and Die Material

摘要

A new ZrO_2 nano-composite ceramic tool and die material was prepared with vacuum hot pressing technique. The effects of sintering parameters on the nano-composite ceramic tool and die materials were studied. The results indicated that the mechanical properties of ZrO_2 nano-composite ceramic tool and die material with the additions of TiB_2 and Al_2O_3 are higher than that of the pure ZrO_2 ceramic material. Sintering at 1100 for 120min could improve the density and mechanical properties of ZrO_2 nano-composite ceramic material. The flexural strength, fracture toughness and hardness with the optimum sintering parameters can reach 878MPa, 9.54MPa·m~(1/2) and 13.48GPa, respectively, obviously higher than that with non-optimum sintering parameters.