Relationships between fracture toughness, Y2O3 fraction and phases content in modern dental Yttria-doped zirconias

Belli R, Hurle K, Schürrlein J, Petschelt A, Werbach K, Peterlik H, Rabe T, Mieller B, Lohbauer U (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Journal of the European Ceramic Society Elsevier

Book Volume: 41

Pages Range: 7771-7782

Journal Issue: 15

DOI: 10.1016/j.jeurceramsoc.2021.08.003

Abstract

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%.

Authors with CRIS profile

Renan Belli Department of Operative Dentistry and Periodontology Katrin Hurle Lehrstuhl für Mineralogie Jana Schürrlein Medizinische Fakultät Anselm Petschelt Medizinische Fakultät Ulrich Lohbauer Medizinische Fakultät

Involved external institutions

Bundesanstalt für Materialforschung und -prüfung (BAM) DE Germany (DE) Universität Wien / University of Vienna AT Austria (AT)

How to cite

APA:

Belli, R., Hurle, K., Schürrlein, J., Petschelt, A., Werbach, K., Peterlik, H.,... Lohbauer, U. (2021). Relationships between fracture toughness, Y2O3 fraction and phases content in modern dental Yttria-doped zirconias. Journal of the European Ceramic Society, 41(15), 7771-7782. https://doi.org/10.1016/j.jeurceramsoc.2021.08.003

MLA:

Belli, Renan, et al. "Relationships between fracture toughness, Y2O3 fraction and phases content in modern dental Yttria-doped zirconias." Journal of the European Ceramic Society 41.15 (2021): 7771-7782.

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