| 摘要 |
A high toughness sintered body is described, consisting essentially of from 40 to 99.5% by weight of Component A, and 0.5 to 60% by weight of Component B, wherein the mean grain size of the sintered body is 3 microns or less, and Components A and B are as follows: Component A: ZrO2 containing a stabilizer, such as Y2O3, CaO, and MgO, in which the fraction of the tetragonal and cubic ZrO2 constitutes at least 90% by weight, and the ratio of the tetragonal ZrO2 to the cubic ZrO2 is at least 1/3; and Component B: at least one of Al2O3 and TiN, with impurities being 3% by weight or less of SiO2, 0.5% by weight or less of Fe2O3, and 0.5% by weight or less of TiO2, provided that the total amount is 3% by weight or less.
|
