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

Fawad Inam, Haixue Yan, Ton Peijs, Michael Reece

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)947-952
JournalComposites Science and Technology
Volume70
Issue number6
DOIs
Publication statusPublished - Jun 2010

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