| 摘要 |
A high-toughness ZrO2 sintered body contains Nd2O3 and Y2O3 as stabilizers of the crystal structure of ZrO2. The sintered body consists essentially of ZrO2 containing 0.1 to 3 mol% of Nd2O3 and 0.5 to 3.5 mol% of Y2O3. Alternatively, the material composition contains in addition 10 to 60 volume% of at least one of Al2O3, SiC, TiC, B4C and TiB2. Preferably, the sintered body has a stress-induced transformation ratio of 25% or more. |
