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Toughened carbon nanotube-iron-mullite composites prepared by spark plasma sintering

Weibel, Alicia and Peigney, Alain and Chevallier, Geoffroy and Estournès, Claude and Laurent, Christophe Toughened carbon nanotube-iron-mullite composites prepared by spark plasma sintering. (2013) Ceramics International, 39 (5). 5513-5519. ISSN 0272-8842

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Official URL: http://dx.doi.org/10.1016/j.ceramint.2012.12.063

Abstract

Carbon nanotube-iron mullite nanocomposite powders were prepared by a direct method involing a reduction in H2-CH4 and without any mechanical mixing step. The carbon nanotubes are mostly double-andfew-walled (3-6walls). Some carbon nanofibers are also observed. The materials were consolidated by spark plasmas intering. Their electrical conductivity is 2.4S/cm where as pure mullite is insulating. There is no increase in fracture strength, but the SENB toughness is twice than the one for unreinforced mullite(3.3vs.1.6 MPam½). The mechanisms of carbon nanotube bundle pull out and large-scale crack-bridging have been evidenced.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF can be found at Ceramics International website: http://www.sciencedirect.com/science/article/pii/S0272884212014241/science/article/pii/S0272884212014241
HAL Id:hal-00864749
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:23 Sep 2013 09:11

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