2Y-TZP ceramics with high strength and toughness by optimizing the microstructure

0583142 - ÚFM 2025 RIV GB eng J - Článek v odborném periodiku
Trunec, M. - Štastný, P. - Kaštyl, J. - Roupcová, P. - Chlup, Zdeněk
2Y-TZP ceramics with high strength and toughness by optimizing the microstructure.
Journal of the European Ceramic Society. Roč. 44, č. 5 (2024), s. 3258-3266. ISSN 0955-2219. E-ISSN 1873-619X
Institucionální podpora: RVO:68081723
Klíčová slova: Gelcasting * Mechanical properties * Microstructure * Transformation toughening * Zirconia
Obor OECD: Ceramics
Impakt faktor: 5.7, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0955221923010403?via%3Dihub

Low-yttria doped zirconia polycrystals (Y-TZP) have recently emerged as new fine-grained zirconia ceramics exhibiting a promising combination of high fracture toughness and strength. In this investigation, we optimized the strength and fracture toughness of 2Y-TZP ceramics prepared by gelcasting and pressureless sintering. The 2Y-TZP ceramics with optimized processing reached a mean biaxial strength of 1070 MPa, similar to the strength obtained for the standard 3Y-TZP ceramics. However, a higher transformability of tetragonal grains in 2Y-TZP ceramics resulted in a stronger transformation toughening effect compared with 3Y-TZP ceramics. The fracture toughness obtained for 2Y-TZP exceeded that of 3Y-TZP (7.7 vs. 5.2 MPa m0.5). The differences in the microstructure and toughening mechanism between 2Y-TZP and 3Y-TZP were described, and the potential benefits of the 2Y-TZP were discussed.
Trvalý link: https://hdl.handle.net/11104/0352701