Tetragonal zirconia ceramic powders, tetragonal zirconia-alumina composite using the ceramic powder and method of preparation for the same
US6380113B1 · kind B1 · utility
13Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Apr 10, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/4885
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a zirconia/alumina composite and a manufacturing method thereof which provide a zirconia ceramic powder having a composition in a triangle composition range formed of three composition points of 92 mol % ZrO2-4 mol % Y2O3-4 mol % Nb2O5 (or Ta2O5), 89 mol % ZrO2-7 mol % Y2O3-4 mol % Nb2O5 (or Ta2O5), 86 mol % ZrO2-7 mol % Y2O3-7 mol % Nb2O5 (or Ta2O5) in a ternary system of ZrO2—Y2O3—Nb2O5 or Ta2O3 for thereby manufacturing a zirconia/alumina composite having a high strength and high toughness in a state that a low temperature degradation does not occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.