The sintering and grain growth behaviour of ceramic–carbon nanotube nanocomposites

Inam, Fawad, Yan, Haixue, Peijs, Ton and Reece, Michael (2010) The sintering and grain growth behaviour of ceramic–carbon nanotube nanocomposites. Composites Science and Technology, 70 (6). pp. 947-952. ISSN 0266-3538

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Official URL: http://dx.doi.org/10.1016/j.compscitech.2010.02.01...

Abstract

The sintering and grain growth behaviour of alumina + 2, 3.5 and 5 wt.% carbon nanotubes (CNTs) and alumina + 2 wt.% carbon black nanocomposites prepared by Spark Plasma Sintering (SPS) were studied. The addition of CNTs to ceramics produces a large reduction in the sintering temperature required for their complete densification and a significant grain size refinement by a previously unreported mechanism. The CNTs form a strong entangled network around the grains, which constrains the normal and abnormal grain growth. An alumina/alumina + 2 wt.% CNT/alumina laminate structure was prepared to demonstrate directly the large grain-growth retardation effect of CNTs. These effects open up the possibility of using CNTs as a sintering aid to control the sintering behaviour and microstructures of ceramics in bulk, laminate and functionally gradient (FGM) form.

Item Type: Article
Uncontrolled Keywords: Carbon nanotubes, ceramics, nanocomposites, powder processing, sintering
Subjects: F200 Materials Science
F300 Physics
J300 Ceramics and Glasses
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Fawad Inam
Date Deposited: 24 May 2013 15:04
Last Modified: 10 Aug 2015 11:22
URI: http://nrl.northumbria.ac.uk/id/eprint/12665

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