Publikationen

Relationships between fracture toughness, Y<sub>2</sub>O<sub>3</sub> fraction and phases content in modern dental Yttria-doped zirconias

Autor(en)
Renan Belli, Katrin Hurle, Jana Schürrlein, Anselm Petschelt, Katharina Werbach, Herwig Peterlik, Torsten Rabe, Björn Mieller, Ulrich Lohbauer
Abstrakt

The relationship between fracture toughness and Yttria content in modern zirconia ceramics was revised. For that purpose, we evaluated here 10 modern Y2O3-stabilized zirconia (YSZ) materials currently used in biomedical applications, namely prosthetic and implant dentistry. The most relevant range between 2-5 mol% Y2O3 was addressed by selecting from conventional opaque 3 mol% YSZ up to more translucent compositions (4−5 mol% YSZs). A technical 2YSZ was used to extend the range of our evaluation. The bulk mol% Y2O3 concentration was measured by X-Ray Fluorescence Spectroscopy. Phase quantification by Rietveld refinement considered two tetragonal phases or an additional cubic phase. A first-account of the fracture toughness (KIc) of the pre-sintered blocks is given, which amounted to 0.4 – 0.7 MPa√m. In the fully-densified state, an inverse power-law behavior was obtained between KIc and bulk mol% Y2O3 content, whether using only our measurements or including literature data, challenging some established relationships. A linear relationship between KIc and the fraction of the transformable t-phase was established within the range of 30–70 vol%.

Organisation(en)
Dynamik Kondensierter Systeme
Externe Organisation(en)
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Bundesanstalt für Materialforschung und -prüfung (BAM)
Journal
Journal of the European Ceramic Society
Band
41
Seiten
7771-7782
Anzahl der Seiten
12
ISSN
0955-2219
DOI
https://doi.org/10.1016/j.jeurceramsoc.2021.08.003
Publikationsdatum
08-2021
Peer-reviewed
Ja
ÖFOS 2012
103018 Materialphysik, 104011 Materialchemie, 205009 Keramische Werkstoffe
Schlagwörter
ASJC Scopus Sachgebiete
Ceramics and Composites, Materials Chemistry
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/relationships-between-fracture-toughness-y2o3-fraction-and-phases-content-in-modern-dental-yttriadoped-zirconias(8a9a7d75-f50a-4a3d-a149-b0dfac29c11d).html