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In situ growth of carbon nanotubes in alumina-zirconia nanocomposite matrix prepared by solution combustion method

Beitollahi, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ceramint.2011.12.033
  3. Publisher: 2012
  4. Abstract:
  5. In this work successful synthesis of multiwall carbon nanotube (CNT) using solution combustion and chemical vapor deposition (CVD) methods are reported. Ceramic nanocomposite samples of (Al 2-xFe xO 3)-(y)ZrO 2 formula with x = 0.017, 0.034 and 0.17 and y = 0.15 were initially prepared. These were then subjected to CVD process during which the in situ reduction of iron oxide to metallic iron (Fe/Fe 3C) phase/s provided the necessary catalyst for the CNT formation. The formation of long flexible filaments with a smooth and regular surface bridging between alumina-zirconia (AZ) grains could be detected. The diameters of the formed filaments were in the range of ∼70 to ∼320 nm and length of the order of some tens of micrometers. However, transmission electron microscope (TEM) examinations also revealed the existence of small amounts of Bamboo-like carbon along with more or less straight CNTs. This could be related to the lack of strong interactions between the metallic iron phase/s and the nanocomposite support
  6. Keywords:
  7. Solution combustion ; Alumina-zirconia ; Ceramic nanocomposites ; Chemical vapor deposition methods ; CNT ; CVD process ; Flexible filaments ; In-situ ; In-situ growth ; Metallic iron ; Nanocomposite matrix ; Regular surfaces ; Solution combustion method ; Strong interaction ; Alumina ; Chemical vapor deposition ; Combustion ; Multiwalled carbon nanotubes (MWCN) ; Nanocomposites ; Transmission electron microscopy ; Zirconia
  8. Source: Ceramics International ; Volume 38, Issue 4 , May , 2012 , Pages 3273-3280 ; 02728842 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S027288421101100X