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Double-walled carbon nanotube/zirconia composites: Preparation by spark plasma sintering, electrical conductivity and mechanical properties

Kasperski, Anne and Weibel, Alicia and Al-Kattan, Dalya and Estournès, Claude and Laurent, Christophe and Peigney, Alain Double-walled carbon nanotube/zirconia composites: Preparation by spark plasma sintering, electrical conductivity and mechanical properties. (2015) Ceramics International, 41. 13731-13738. ISSN 0272-8842

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Official URL: http://dx.doi.org/10.1016/j.ceramint.2015.08.034

Abstract

Double-walled carbon nanotube/yttria-stabilized zirconia composite powders with carbon contents up to 6.3 wt% are prepared by soft covalent functionalization of carbon nanotubes (CNTs) followed by mixing with a nanometric yttria-stabilized zirconia (YSZ) powder. Composites are densified by spark plasma sintering (SPS). The composites present an electrical conductivity (0.09–0.88 S cm−1) which is among the highest values reported in the literature. Both the fracture strength (σf) and the single-edged notched beam fracture toughness (KIc) are measured for the first time on CNT/YSZ composites. The best mechanical properties (σf=694 MPa; KIc=7 MPa m1/2), obtained for low carbon contents (up to 1.2 wt%), are among the highest reported up to now. However, the fracture toughness is lower than that of the YSZ ceramic (KIc=10.3 MPa m1/2) whose mechanical properties are outstanding, taking into account its very fine microstructure.

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 http://www.sciencedirect.com/science/article/pii/S027288421501559X
HAL Id:hal-01449152
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:30 Jan 2017 09:38

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