抄録
Metastable ZrO2 solid solution powders containing 25 mol% Al2O3 have been prepared by calcining the hydrolysis co-precipitates of zirconium and aluminium alkoxides and have been sintered by the hot isostatic pressing technique. The sintered specimen consists of mixture of tetragonal zirconia solid solution and monoclinic zirconia solid solution. The solid solution ceramics with about 55% of tetragonal phase which have homogeneous microstructure with the range of grain size from 10 to 50 nm give very high fracture toughness of 23 MPa⋅m1/2.
