Pressureless sintering of yttria-gadolinia co-stabilized zirconia |
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| Affiliation: | 1. University of Pavia, Department of Chemistry, viale Taramelli 16, 27100 Pavia, Italy;2. INSTM, National Inter-University Consortium for Materials Science and Technology, Via G. Giusti 9, 50121 Florence, Italy;3. ESRF – The European Synchrotron, 71, avenue des Martyrs, 38000 Grenoble, France;1. CEITEC BUT, Brno University of Technology, Purkynova 123, Brno 61200, Czech Republic;2. Institute of Materials Science and Engineering, Brno University of Technology, Technicka 2, Brno 61669, Czech Republic;1. Joint Glass Centre of the IIC SAS, TnUAD and FChPT STU, Trencin, Slovak Republic;2. Centre for Functional and Surface Functionalised Glass, Alexander Dubcek University of Trencin, Trencin, Slovak Republic;3. Institute of Inorganic Chemistry, Dúbravská cesta 9, 845 36 Bratislava 45, Slovak Republic;4. Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Ko?ice, Slovak Republic;1. Univ Lyon, INSA Lyon, Université Lyon1, CNRS, MATEIS, UMR5510, 69621 Villeurbanne, France;2. Univ Lyon, Université Lyon1, CNRS, CPE-Lyon, ICBMS, UMR 5246, 69622 Villeurbanne, France;1. School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China;2. School of Mechanical Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, China |
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| Abstract: | Zirconia ceramics partially stabilized with yttria and gadolinia (3-x)Y,xGd-TZP; x = 0–2] were manufactured by intensive co-milling of zirconia and stabilizer oxides, spray granulation, axial pressing and pressureless sintering at 1300–1400 °C. Microstructure, phase composition and mechanical properties were determined. Stabilizer re-distribution in the materials at higher sintering temperatures was monitored by XRD. Substitution of yttria for gadolinia reduces the stabilizer content in the tetragonal phase, increases the tetragonality of the materials and induces higher transformability and toughness. The hardness is thereby reduced. In accordance with thermodynamic considerations the cubic content increases with increasing gadolinia content. |
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| Keywords: | Zirconia Mechanical properties Phase composition Microstructure |
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