Spark plasma sintering of beta-Eucryptite/alumina nanocomposites with low thermal expansion and improved mechanical properties obtained by colloidal route
[EN] In this study, (3-Eucryptite/alumina nanocomposites were synthesized using colloidal methods and sintered by Spark Plasma Sintering (SPS). Nanocomposites with three different alumina contents (2.5, 5 and 10 wt%) were prepared, with pure (3-Eucryptite serving as a reference material. The microst...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/230874 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/230874 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanocomposites Colloidal synthesis Spark plasma sintering Mechanical properties Coefficient of thermal expansion 12.- Garantizar las pautas de consumo y de producción sostenibles |
| Sumario: | [EN] In this study, (3-Eucryptite/alumina nanocomposites were synthesized using colloidal methods and sintered by Spark Plasma Sintering (SPS). Nanocomposites with three different alumina contents (2.5, 5 and 10 wt%) were prepared, with pure (3-Eucryptite serving as a reference material. The microstructural characteristics of the nanocomposites were analyzed, and their mechanical properties (Young's modulus, hardness, flexural strength, fracture toughness) were evaluated. The incorporation of alumina nanoparticles effectively controlled the grain growth of (3-Eucryptite during the sintering process, resulting in a fine-grained structure. Compared to monolithic (3-Eucryptite, the nanocomposites exhibited significant enhancements in mechanical performance: hardness increased by at least 25 %, fracture toughness improved by 30 %, and mechanical strength rose by more than 40 %. Furthermore, the composites demonstrated a very low thermal expansion coefficient, making them promising candidates for a wide range of industrial applications. |
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