A Revised Relationship Between Fracture Toughness and Y2O3 Content in Modern Dental Zirconias

• DOI: 10.26434/chemrxiv.14044205.v1
• Publication Date: 2021-02-18T05:51:17Z
• Authors: Renan Belli; Katrin Hurle; Jana Schürrlein; Anselm Petschelt; Katharina Werbach; Herwig Peterlik; Torsten Rabe; Björn Mieller; Ulrich LOHBAUER
• Keywords: Rietveld Refinement; Tetragonal crystal system

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