Transformation behavior of yttria stabilized tetragonal zirconia polycrystal–TiB2 composites
- 1 July 2001
- journal article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 16 (7), 2158-2169
- https://doi.org/10.1557/jmr.2001.0294
Abstract
The objective of the present article is to study the influence of TiB2 addition on the transformation behavior of yttria stabilized tetragonal zirconia polycrystals (Y-TZP). A range of TZP(Y)–TiB2 composites with different zirconia starting powder grades and TiB2 phase contents (up to 50 vol%) were processed by the hot-pressing route. Thermal expansion data, as obtained by thermo-mechanical analysis were used to assess the ZrO2 phase transformation in the composites. The thermal expansion hysteresis of the transformable ceramics provides information concerning the transformation behavior in the temperature range of the martensitic transformation and the low-temperature degradation. Furthermore, the transformation behavior and susceptibility to low-temperature degradation during thermal cycling were characterized in terms of the overall amount and distribution of the yttria stabilizer, zirconia grain size, possible dissolution of TiB2 phase, and the amount of residual stress generated in the Y-TZP matrix due to the addition of titanium diboride particles. For the first time, it is demonstrated in the present work that the thermally induced phase transformation of tetragonal zirconia in the Y-TZP composites can be controlled by the intentional addition of the monoclinic zirconia particles into the 3Y-TZP matrix.Keywords
This publication has 24 references indexed in Scilit:
- Transformation Toughening in Zirconia‐Containing CeramicsJournal of the American Ceramic Society, 2000
- Thermal expansion and damping characteristics of Y-TZPScripta Materialia, 1999
- Grain boundary segregation in high-purity, yttria-stabilized tetragonal zirconia polycrystals (Y-TZP)Journal of the European Ceramic Society, 1998
- Stress-Induced Phase Transformation of ZrO2 in ZrO2 (3mol%Y2O3)-25vol%Al2O3 Composite Studied by Transmission Electron MicroscopyScripta Materialia, 1998
- Influence of crystal anisotropy on residual stresses in ceramic compositesScripta Materialia, 1997
- Perspective on the Development of High‐Toughness CeramicsJournal of the American Ceramic Society, 1990
- High toughness ceramics and ceramic compositesProgress in Materials Science, 1989
- Strengthening and toughening of boride and carbide hard material compositesMaterials Science and Engineering: A, 1988
- Mechanics of Transformation‐Toughening in Brittle MaterialsJournal of the American Ceramic Society, 1982
- Ceramic steel?Nature, 1975