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Anisotropic mechanical and functional properties of graphene-based alumina matrix nanocomposites

Çelik, Yasemin and Çelik, Ali and Flahaut, Emmanuel and Suvacı, Ender Anisotropic mechanical and functional properties of graphene-based alumina matrix nanocomposites. (2016) Journal of the European Ceramic Society, 36 (8). 2075-2086. ISSN 0955-2219

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Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2016.02.032


Graphene platelets (GPLs) containing Al2O3 nanocomposites, which exhibit anisotropic microstructure,have been prepared by spark plasma sintering (SPS), and effects of this anisotropy on mechanical, elec-trical and thermal properties of the nanocomposites have been investigated. 3 vol.% GPLs addition intomonolithic Al2O3caused fracture toughness (Kıc) to increase by 26.7% in the in-plane direction and todecrease by 17.2% in the through thickness direction. Kıcstarted to decrease in the in-plane direction andto increase in the through-thickness direction with further increase in the GPLs amount. The electricalconductivity of the nanocomposites exhibited a slight anisotropy with a lower resistivity in the in-planedirection. Oriented GPLs also led to a less resistive heat conduction path in the in-plane direction. ∼44%increase in the in-plane thermal conductivity was achieved at 600◦C with 15 vol.% GPLs addition into themonolithic Al2O3and this resulted in ∼52% increase in the kin-plane/kthrough-thicknessratio.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of the European Ceramic Society website : http://www.sciencedirect.com/science/journal/09552219
HAL Id:hal-01451008
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Anadolu University (TURKEY)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Anadolu University Scientific Research Projects Commission (TURKEY)
Deposited On:31 Jan 2017 09:06

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