Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers

The graphene family comprises not only single layer graphene but also graphene-based nanomaterials (GBN), with remarkably different number of layers, lateral dimension and price. In this work, two of these GBN, namely graphene nanoplatelets (GNP) with n∼15–30 layers and few-layer graphene (FLG) with...

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Autores: Muñoz Ferreiro, Carmen, Morales Rodríguez, Ana, Rojas Ruiz, Teresa Cristina, Jiménez Piqué, Emilio, López Pernía, Cristina, Poyato Galán, Rosalía, Gallardo López, Ángela María
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Recursos:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/142519
Acesso em linha:https://hdl.handle.net/11441/142519
https://doi.org/10.1016/j.jallcom.2018.10.336
Access Level:acceso abierto
Palavra-chave:Ceramics
Composite materials
Electrical conductivity
Grain boundaries
Nanostructures
Transmission electron microscopy: TEM
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spelling Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillersMuñoz Ferreiro, CarmenMorales Rodríguez, AnaRojas Ruiz, Teresa CristinaJiménez Piqué, EmilioLópez Pernía, CristinaPoyato Galán, RosalíaGallardo López, Ángela MaríaCeramicsComposite materialsElectrical conductivityGrain boundariesNanostructuresTransmission electron microscopy: TEMThe graphene family comprises not only single layer graphene but also graphene-based nanomaterials (GBN), with remarkably different number of layers, lateral dimension and price. In this work, two of these GBN, namely graphene nanoplatelets (GNP) with n∼15–30 layers and few-layer graphene (FLG) with n < 3 layers have been evaluated as fillers in 3 mol% yttria stabilized tetragonal zirconia (3YTZP) ceramic composites. Composites with 10 and 20 vol% GNP or FLG have been fabricated by wet powder processing and spark plasma sintering (SPS) and the influence of the content and number of layers of the graphene-based filler has been assessed. For both graphene-based fillers, an intermediate zirconia oxycarbide has been detected in the grain boundaries. The lower stacking degree and much more homogeneous distribution of the FLG, revealed by transmission electron microscopy (TEM), can improve load transfer between the GBNs and the ceramic matrix. However, high FLG contents lower densification of the composites, due partly to the larger FLG interplanar spacing also estimated by TEM. The hardness (both Vickers and nanoindentation) and the elastic modulus decrease with increased GBN content and with improved graphene dispersion. The FLG greatly inhibit the crack propagation that occur perpendicular to their preferential orientation plane. The composites with thinner FLG have higher electrical conductivity than those with GNP. The highest electrical conductivity is achieved by composites with 20 vol% FLG in the direction perpendicular to the compression axis during sintering, σ⊥ = 3400 ± 500 Sm-1.Ministerio de Economía y Competitividad MAT2015-67889-PPremio Mensual Publicación Científica Destacada de la US. Facultad de FísicaElsevierFísica de la Materia CondensadaMinisterio de Economía y Competitividad (MINECO). España2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/142519https://doi.org/10.1016/j.jallcom.2018.10.336reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésJournal of Alloys and Compounds, 777, 213-224.MAT2015-67889-Phttps://doi.org/10.1016/j.jallcom.2018.10.336info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1425192026-06-17T12:51:07Z
dc.title.none.fl_str_mv Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers
title Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers
spellingShingle Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers
Muñoz Ferreiro, Carmen
Ceramics
Composite materials
Electrical conductivity
Grain boundaries
Nanostructures
Transmission electron microscopy: TEM
title_short Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers
title_full Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers
title_fullStr Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers
title_full_unstemmed Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers
title_sort Microstructure, interfaces and properties of 3YTZP ceramic composites with 10 and 20 vol% different graphene-based nanostructures as fillers
dc.creator.none.fl_str_mv Muñoz Ferreiro, Carmen
Morales Rodríguez, Ana
Rojas Ruiz, Teresa Cristina
Jiménez Piqué, Emilio
López Pernía, Cristina
Poyato Galán, Rosalía
Gallardo López, Ángela María
author Muñoz Ferreiro, Carmen
author_facet Muñoz Ferreiro, Carmen
Morales Rodríguez, Ana
Rojas Ruiz, Teresa Cristina
Jiménez Piqué, Emilio
López Pernía, Cristina
Poyato Galán, Rosalía
Gallardo López, Ángela María
author_role author
author2 Morales Rodríguez, Ana
Rojas Ruiz, Teresa Cristina
Jiménez Piqué, Emilio
López Pernía, Cristina
Poyato Galán, Rosalía
Gallardo López, Ángela María
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Física de la Materia Condensada
Ministerio de Economía y Competitividad (MINECO). España
dc.subject.none.fl_str_mv Ceramics
Composite materials
Electrical conductivity
Grain boundaries
Nanostructures
Transmission electron microscopy: TEM
topic Ceramics
Composite materials
Electrical conductivity
Grain boundaries
Nanostructures
Transmission electron microscopy: TEM
description The graphene family comprises not only single layer graphene but also graphene-based nanomaterials (GBN), with remarkably different number of layers, lateral dimension and price. In this work, two of these GBN, namely graphene nanoplatelets (GNP) with n∼15–30 layers and few-layer graphene (FLG) with n < 3 layers have been evaluated as fillers in 3 mol% yttria stabilized tetragonal zirconia (3YTZP) ceramic composites. Composites with 10 and 20 vol% GNP or FLG have been fabricated by wet powder processing and spark plasma sintering (SPS) and the influence of the content and number of layers of the graphene-based filler has been assessed. For both graphene-based fillers, an intermediate zirconia oxycarbide has been detected in the grain boundaries. The lower stacking degree and much more homogeneous distribution of the FLG, revealed by transmission electron microscopy (TEM), can improve load transfer between the GBNs and the ceramic matrix. However, high FLG contents lower densification of the composites, due partly to the larger FLG interplanar spacing also estimated by TEM. The hardness (both Vickers and nanoindentation) and the elastic modulus decrease with increased GBN content and with improved graphene dispersion. The FLG greatly inhibit the crack propagation that occur perpendicular to their preferential orientation plane. The composites with thinner FLG have higher electrical conductivity than those with GNP. The highest electrical conductivity is achieved by composites with 20 vol% FLG in the direction perpendicular to the compression axis during sintering, σ⊥ = 3400 ± 500 Sm-1.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/142519
https://doi.org/10.1016/j.jallcom.2018.10.336
url https://hdl.handle.net/11441/142519
https://doi.org/10.1016/j.jallcom.2018.10.336
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Journal of Alloys and Compounds, 777, 213-224.
MAT2015-67889-P
https://doi.org/10.1016/j.jallcom.2018.10.336
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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