Microwave Sintering of Zirconia Materials: Mechanical and Microstructural Properties |
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| Authors: | Amparo Borrell María D. Salvador Felipe L. Peñaranda‐Foix Jose M. Cátala‐Civera |
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| Affiliation: | 1. Parque Tecnológico de Asturias, Centro de Investigación en Nanomateriales y Nanotecnología (CINN) (Consejo Superior de Investigaciones Científicas‐Universidad de Oviedo‐Principado de Asturias), , Llanera (Asturias), 33428 Spain;2. Instituto de Tecnología de Materiales (ITM), Universidad Politécnica de Valencia, , Valencia, 46022 Spain;3. Instituto de Aplicaciones de las Tecnologías de la Información y de las Comunicaciones Avanzadas (ITACA), Universidad Politécnica de Valencia, , Valencia, 46022 Spain |
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| Abstract: | Commercially, 3 mol% Y2O3‐stabilized tetragonal zirconia (70–90 nm) compacts were fabricated using a conventional and a nonconventional sintering technique; microwave heating in a resonant mono‐mode cavity at 2.45 GHz, at temperatures in the 1100–1400°C range. A considerable difference in the densification behavior between conventional (CS) and microwave (MW) sintered materials was observed. The MW materials attain a full density of 99.9% of the theoretical density (t.d.) at 1400°C/10 min, whereas the CS reach only 98.0% t.d. at the same temperature and 1 h of dwelling time. Therefore, the MW materials exhibit superior Vickers hardness values (16.0 GPa) when compared with CS (13.4 GPa). |
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