Enhanced properties of ZrSiO4/ZrO2 composites produced by colloidal processing and spark plasma sintering
Zirconium oxide and silicate are well-known reference materials in ceramics. However, the performance of zircon/zirconia composites has not received the required attention considering the interesting properties and capabilities. Zircon and zircon/zirconia suspensions were optimised by colloidal proc...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/376643 |
| Acceso en línea: | http://hdl.handle.net/10261/376643 |
| Access Level: | acceso abierto |
| Palabra clave: | Zircon Zirconia Slip casting Spark Plasma Sintering (SPS) Mechanical properties |
| Sumario: | Zirconium oxide and silicate are well-known reference materials in ceramics. However, the performance of zircon/zirconia composites has not received the required attention considering the interesting properties and capabilities. Zircon and zircon/zirconia suspensions were optimised by colloidal processing routes. These suspensions were either slip cast to obtain pieces that were conventionally sintered or freeze-dried to obtain homogeneous powder mixtures for consolidation by non-conventional Spark Plasma Sintering (SPS). Pure zircon materials with densities up to 97.0 % and a hardness of 10.1 GPa were obtained by conventional sintering (1550 ºC/120 min) whereas densities higher than 99.5 % and hardness up to 12.7 GPa were achieved by SPS (1500 ºC/5 min). By introducing 20 vol.% zirconia as a sintering additive, densities up to 99.3 % and a hardness of 11.1 GPa were achieved by conventional sintering (1500 ºC/120 min) whereas densities of 99.9 % and a hardness of 13.5 GPa were obtained by SPS (1400 ºC/5 min). |
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