3Y-TZP ceramics with improved hydrothermal degradation resistance and fracture toughness |
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| Affiliation: | 1. Department of Metallurgy and Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium;2. KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7 blok a, B-3000 Leuven, Belgium;3. Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;1. Instituto de Tecnología de Materiales (ITM), Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain;2. Instituto de Aplicaciones de las Tecnologías de la Información y de las Comunicaciones Avanzadas (ITACA), Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain;3. Instituto de Cerámica y Vidrio (ICV), Consejo Superior de Investigaciones Científicas (CSIC), E-28049 Madrid, Spain;1. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg, Belgium;2. KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Belgium;1. KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, blok a bus 7001, B-3000 Leuven, Belgium;2. Department of Materials Engineering, KU Leuven (University of Leuven), Kasteelpark Arenberg 44, B-3001 Heverlee, Belgium;3. Department of Biomaterials, University of Athens, 2 Thivon Str., Goudi, 115 27 Athens, Greece;4. Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo 113-8549, Japan;1. KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44, Belgium;2. KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Belgium;3. UMR CNRS 5510 (MATEIS), National Institute of Applied Sciences, INSA de Lyon, France;1. Division of Fixed Prosthodontics and Biomaterials, School of Dentistry, University of Geneva, Geneva, Switzerland;2. UMR CNRS 5510 (MATEIS), INSA-Lyon, Villeurbanne, France;3. Department of Biomaterials, Faculty of Odontology, University Lyon 1, Lyon, France |
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| Abstract: | Different factors such as the way of incorporating the Y2O3 stabilizer, alumina addition and sintering temperature were assessed with the goal to improve the low temperature degradation (LTD) resistance of 3Y-TZP without compromising on the mechanical properties. The degradation of hydrothermally treated specimens was studied by X-ray diffraction, micro-Raman spectroscopy and scanning electron microscopy.Decreasing the sintering temperature decreased the LTD susceptibility of 3Y-TZPs but did not allow to obtain a LTD resistant 3Y-TZP with optimized mechanical properties. Alumina addition along with the use of Y2O3 stabilizer coated starting powder allowed to combine both an excellent toughness and LTD resistance, as compared to alumina-free and stabilizer co-precipitated powder based equivalents. Transmission electron microscopy revealed that the improved LTD resistance could be attributed to the segregation of Al3+ at the grain boundary and the heterogeneously distributed Y3+ stabilizer. |
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| Keywords: | Coated 3Y-TZP Co-precipitated 3Y-TZP Degradation Alumina |
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