Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites
This is an early access version, the complete PDF, HTML, and XML versions will be available soon
| Autores: | , , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/379532 |
| Acesso em linha: | http://hdl.handle.net/10261/379532 |
| Access Level: | acceso abierto |
| Palavra-chave: | Nanostructured composite Alumina Eucryptite Fracture toughness |
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oai:digital.csic.es:10261/379532 |
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Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites Inocente, Jordana Mariot Costa, Renata Bochanoski da Mattos, Ana Sônia Alcázar, Carmen Borrell, Amparo Moreno, Rodrigo Arcaro, Sabrina Montedo, Oscar Rubem Klegues Nanostructured composite Alumina Eucryptite Fracture toughness This is an early access version, the complete PDF, HTML, and XML versions will be available soon Alumina is one of the most studied and used ceramic materials, but increasing its fracture toughness is still a challenge for many specific impact applications. Adding a second phase with a low coefficient of thermal expansion (CTE) to an alumina matrix can enhance the matrix’s mechanical properties, reduce its sintering temperature, and increase its toughness by generating compressive stresses on the alumina particle surface. In this study, nanostructured alumina/eucryptite composites were prepared to achieve enhanced toughness. First, eucryptite (Li₂O·Al₂O₃·2SiO₂) nanoparticles were successfully synthesised via colloidal heterocoagulation. These nanoparticles were then used to reinforce alumina matrices through slip casting followed by conventional sintering. Complete crystallisation of eucryptite was achieved at 850 °C with a CTE of 0.46 × 10 −⁶ °C −¹. Transmission electron microscopy analysis revealed that the average particle size was 28.5 ± 14.5 nm. To achieve a relative density of 95.3%, the composite containing 5 vol.% eucryptite required sintering for 1 h at 1400 °C whereas pure alumina required 2 h at 1600 °C. This reduction in sintering temperature (by up to 200 °C) helped to improve the fracture toughness, with the alumina grain size decreasing from 2.3 to 0.9 µm. The advantages of the new composite are the more economically viable and environmentally friendly way of producing the lithium aluminosilicate nanoparticles, compared to the production of ceramic frits at high temperatures (~1500 °C). Peer reviewed Multidisciplinary Digital Publishing Institute http://hdl.handle.net/10261/379532 |
| title |
Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites |
| spellingShingle |
Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites Inocente, Jordana Mariot Nanostructured composite Alumina Eucryptite Fracture toughness |
| title_short |
Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites |
| title_full |
Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites |
| title_fullStr |
Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites |
| title_full_unstemmed |
Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites |
| title_sort |
Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites |
| author |
Inocente, Jordana Mariot |
| author_facet |
Inocente, Jordana Mariot Costa, Renata Bochanoski da Mattos, Ana Sônia Alcázar, Carmen Borrell, Amparo Moreno, Rodrigo Arcaro, Sabrina Montedo, Oscar Rubem Klegues |
| author_role |
author |
| author2 |
Costa, Renata Bochanoski da Mattos, Ana Sônia Alcázar, Carmen Borrell, Amparo Moreno, Rodrigo Arcaro, Sabrina Montedo, Oscar Rubem Klegues |
| author2_role |
author author author author author author author |
| topic |
Nanostructured composite Alumina Eucryptite Fracture toughness |
| topic_facet |
Nanostructured composite Alumina Eucryptite Fracture toughness |
| description |
This is an early access version, the complete PDF, HTML, and XML versions will be available soon |
| publishDate |
2025 |
| format |
article |
| status_str |
publishedVersion |
| url |
http://hdl.handle.net/10261/379532 |
| eu_rights_str_mv |
openAccess |
| publisher |
Multidisciplinary Digital Publishing Institute |
| institution |
Consejo Superior de Investigaciones Científicas (CSIC) |
| collection |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| _version_ |
1878431773050798080 |
| publishDateSort |
2025 |
| author_browse |
Alcázar, Carmen Arcaro, Sabrina Borrell, Amparo Costa, Renata Bochanoski da Inocente, Jordana Mariot Mattos, Ana Sônia Montedo, Oscar Rubem Klegues Moreno, Rodrigo |
| publisherStr |
Multidisciplinary Digital Publishing Institute |
| score |
6.924472 |