Enhanced electrical conductivity of silicon carbide ceramics by addition of graphene nanoplatelets

Benito Román-Manso; Eddy Domingues; Filipe M. Figueiredo; Manuel Belmonte; Pilar Miranzo

doi:10.1016/j.jeurceramsoc.2015.03.044

Enhanced electrical conductivity of silicon carbide ceramics by addition of graphene nanoplatelets

Benito Román-Manso, Eddy Domingues, Filipe M. Figueiredo^*, Manuel Belmonte, Pilar Miranzo

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

107 Scopus citations

Abstract

The paper describes the fabrication by liquid-phase spark plasma sintering (SPS) of composites of dense silicon carbide (SiC) with up to 20vol.% graphene nanoplatelets (GNPs), and discusses the relationships between composition, microstructure and electrical conductivity. The structural integrity of the GNPs is preserved during the whole process, as observed by Raman spectroscopy. The effects of the applied pressure (50MPa) during SPS result in the preferential orientation of the GNPs perpendicular to the pressing axis and anisotropic electrical behaviour. The electrical conductivity measured in the direction perpendicular to the SPS pressing axis is 4 to 6 times higher than the parallel counterpart. The conductivity increases up to three orders of magnitude with increasing GNPs fraction, reaching values of 4380Sm^-1 at room temperature for materials with 20vol.% GNPs. The conduction mechanism of the composite is analysed as a function of the GNPs content.

Original language	English (US)
Pages (from-to)	2723-2731
Number of pages	9
Journal	Journal of the European Ceramic Society
Volume	35
Issue number	10
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2015.03.044
State	Published - Sep 1 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

Composites
Electrical conductivity
Graphene nanoplatelets
SiC
Spark plasma sintering

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1016/j.jeurceramsoc.2015.03.044

Cite this

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title = "Enhanced electrical conductivity of silicon carbide ceramics by addition of graphene nanoplatelets",

abstract = "The paper describes the fabrication by liquid-phase spark plasma sintering (SPS) of composites of dense silicon carbide (SiC) with up to 20vol.% graphene nanoplatelets (GNPs), and discusses the relationships between composition, microstructure and electrical conductivity. The structural integrity of the GNPs is preserved during the whole process, as observed by Raman spectroscopy. The effects of the applied pressure (50MPa) during SPS result in the preferential orientation of the GNPs perpendicular to the pressing axis and anisotropic electrical behaviour. The electrical conductivity measured in the direction perpendicular to the SPS pressing axis is 4 to 6 times higher than the parallel counterpart. The conductivity increases up to three orders of magnitude with increasing GNPs fraction, reaching values of 4380Sm-1 at room temperature for materials with 20vol.% GNPs. The conduction mechanism of the composite is analysed as a function of the GNPs content.",

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author = "Benito Rom{\'a}n-Manso and Eddy Domingues and Figueiredo, {Filipe M.} and Manuel Belmonte and Pilar Miranzo",

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T1 - Enhanced electrical conductivity of silicon carbide ceramics by addition of graphene nanoplatelets

AU - Román-Manso, Benito

AU - Domingues, Eddy

AU - Figueiredo, Filipe M.

AU - Belmonte, Manuel

AU - Miranzo, Pilar

PY - 2015/9/1

Y1 - 2015/9/1

N2 - The paper describes the fabrication by liquid-phase spark plasma sintering (SPS) of composites of dense silicon carbide (SiC) with up to 20vol.% graphene nanoplatelets (GNPs), and discusses the relationships between composition, microstructure and electrical conductivity. The structural integrity of the GNPs is preserved during the whole process, as observed by Raman spectroscopy. The effects of the applied pressure (50MPa) during SPS result in the preferential orientation of the GNPs perpendicular to the pressing axis and anisotropic electrical behaviour. The electrical conductivity measured in the direction perpendicular to the SPS pressing axis is 4 to 6 times higher than the parallel counterpart. The conductivity increases up to three orders of magnitude with increasing GNPs fraction, reaching values of 4380Sm-1 at room temperature for materials with 20vol.% GNPs. The conduction mechanism of the composite is analysed as a function of the GNPs content.

AB - The paper describes the fabrication by liquid-phase spark plasma sintering (SPS) of composites of dense silicon carbide (SiC) with up to 20vol.% graphene nanoplatelets (GNPs), and discusses the relationships between composition, microstructure and electrical conductivity. The structural integrity of the GNPs is preserved during the whole process, as observed by Raman spectroscopy. The effects of the applied pressure (50MPa) during SPS result in the preferential orientation of the GNPs perpendicular to the pressing axis and anisotropic electrical behaviour. The electrical conductivity measured in the direction perpendicular to the SPS pressing axis is 4 to 6 times higher than the parallel counterpart. The conductivity increases up to three orders of magnitude with increasing GNPs fraction, reaching values of 4380Sm-1 at room temperature for materials with 20vol.% GNPs. The conduction mechanism of the composite is analysed as a function of the GNPs content.

KW - Composites

KW - Electrical conductivity

KW - Graphene nanoplatelets

KW - SiC

KW - Spark plasma sintering

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JF - Journal of the European Ceramic Society

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ER -

Enhanced electrical conductivity of silicon carbide ceramics by addition of graphene nanoplatelets

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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