抄録
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%.
