Mechanical properties of ceria-calcia stabilized zirconia ceramics with alumina additions
Ceria-stabilized zirconia-based composites have been developed aiming to obtain ceramic materials with enhanced hardness, strength, fracture toughness, and resistance to low temperature degradation. These composites are based on ceria-calcia stabilized zirconia (10 mol% CeO2-1 mol% CaO TZP) and a-al...
| Autores: | , , , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/348241 |
| Acesso em linha: | https://hdl.handle.net/2117/348241 https://dx.doi.org/10.1016/j.jeurceramsoc.2021.05.006 |
| Access Level: | acceso abierto |
| Palavra-chave: | Materials -- Mechanical properties Ceria-stabilized zirconia Calcia Alumina Mechanical properties Aging Materials -- Propietats mecàniques Àrees temàtiques de la UPC::Enginyeria dels materials |
| Resumo: | Ceria-stabilized zirconia-based composites have been developed aiming to obtain ceramic materials with enhanced hardness, strength, fracture toughness, and resistance to low temperature degradation. These composites are based on ceria-calcia stabilized zirconia (10 mol% CeO2-1 mol% CaO TZP) and a-alumina (0-15 wt%) as a second phase. Raw materials in the form of powders were dispersed through ball milling, dried by slip casting, and subsequently grounded before being pressed and conventionally sintered at 1450 °C. Compared to the strength and hardness of 10Ce-TZP ceramics (typically 500 MPa and 6 GPa), an increase was observed for all compositions, especially for 10Ce-1CaO-5Al2O3 (739 MPa and 10.2 GPa). Single Edge V-Notched Beam fracture toughness values ranged from 5.1 to 6.6 MPa·vm, indicating a loss of transformability for all compositions. As in 10Ce-1CaO-TZP co-doped ceramics, the aging resistance of all alumina-containing composites was also excellent. |
|---|