Preparation of Y-TZP Nanoceramics by Superhigh Pressure Compaction

The preparation of Y-TZP nano-ceramics by the superhigh pressure companion was investigated. By applying superhigh pressure of about 3GPa, a green compact with a relative density of about 60% can be obtained, 13% higher than that by a normal cold isostatic press of 450MPa. The sintering ability of this green compact is so good that it can be sintered to 99%' dense at a very low temperature of 1050'C. The relative high density Of the green compact rather than the small pore size makes the sintering ability excellent. Y-TZP nano-ceramics having the grain size of about 80urn were obtained when sintered at 1050C for 5h after CIP of 3GPa.