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

Detalles Bibliográficos
Autores: Inocente, Jordana Mariot, Costa, Renata Bochanoski da, Mattos, Ana Sônia, Alcázar, Carmen, Borrell, Amparo, Moreno, Rodrigo, Arcaro, Sabrina, Montedo, Oscar Rubem Klegues
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/379532
Acceso en línea:http://hdl.handle.net/10261/379532
Access Level:acceso abierto
Palabra clave:Nanostructured composite
Alumina
Eucryptite
Fracture toughness
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spelling Processing and Characterisation of Alumina/Eucryptite Nanostructured CompositesInocente, Jordana MariotCosta, Renata Bochanoski daMattos, Ana SôniaAlcázar, CarmenBorrell, AmparoMoreno, RodrigoArcaro, SabrinaMontedo, Oscar Rubem KleguesNanostructured compositeAluminaEucryptiteFracture toughnessThis is an early access version, the complete PDF, HTML, and XML versions will be available soonAlumina 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 reviewedMultidisciplinary Digital Publishing InstituteCosta, Renata Bochanoski da [0000-0002-0907-5354]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/379532reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.3390/ma18030671Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3795322026-05-22T06:33:51Z
dc.title.none.fl_str_mv Processing and Characterisation of Alumina/Eucryptite Nanostructured Composites
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
dc.creator.none.fl_str_mv Inocente, Jordana Mariot
Costa, Renata Bochanoski da
Mattos, Ana Sônia
Alcázar, Carmen
Borrell, Amparo
Moreno, Rodrigo
Arcaro, Sabrina
Montedo, Oscar Rubem Klegues
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
dc.contributor.none.fl_str_mv Costa, Renata Bochanoski da [0000-0002-0907-5354]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Nanostructured composite
Alumina
Eucryptite
Fracture toughness
topic 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
dc.date.none.fl_str_mv 2025
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/379532
url http://hdl.handle.net/10261/379532
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.3390/ma18030671
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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