Preparation And Properties Of 3y-Tzp Ceramic Tools

Fully densitified 3Y-TZP (>98% of theoretical density) ceramic tools have been prepared by gelcasting and sintered with conventional pressureless at 1500 similar to 1600 degrees C. The microstnicture and mechanical properties as a function of sintering temperature were investigated. The experiment results indicate that the samples with a range of grain size from 300nm to 700nm have high mechanical properties. With the sintering temperature rising, the hardness show no obvious change, the average value is 13.2GPa; while the bending strength have a trend of first increasing then decreasing. The optimal sintering temperature is 1550 degrees C, the bending strength and the fracture toughness all reach the maximum, which is 947 MPa and 8.9MPa.M(1/2).