Abstract
Pure zirconia powder of 0.2 micron was prepared as aqueous slip and compacted under high centrifugal force of about 10,000 g. The phase stabilizer of yttria was infiltrated in pre-sintered body as aqueous solution of yttrium nitrate. There was a difference in sintering performance with slip concentration. The compact with dilute slip (55 mass%) deformed and cracked during sintering, whereas that of thick slip (72 mass%) sintered without deformation. The yttria was successfully added by above mentioned technique which inhibited cracking during sintering. A compact of 99 % in relative density was obtained at 1623 K. The hardness and fracture toughness (IF method) increased with amount of yttria, and reached Hv 1270 and 9.1 MPa • m1/2, respectively, with yttria addition of 2.7 mol%.
