This paper describes the fabrication of hybrid ceramic/carbon scaffolds in which carbon nanofibres and multi-walled carbon nanotubes fully cover the internal walls of a microporous ceramic structure that provides mechanical stability. Freeze casting is used to fabricate a porous, lamellar ceramic (Al2O3) structure with aligned pores whose width can be controlled between 10 and 90μm. Subsequently, a two step chemical vapour deposition process that uses iron as a catalyst is used to grow the carbon nanostructures inside the scaffold. This catalyst remains in the scaffold after the growth process. The formation of the alumina scaffold and the influence of its structure on the growth of nanofibres and tubes are investigated. A set of growth conditions is determined to produce a dense covering of the internal walls of the porous ceramic with the carbon nanostructures. The limiting pore size for this process is located around 25μm. © 2013 Elsevier Ltd.
|Original language||English (US)|
|Number of pages||10|
|Journal||Journal of the European Ceramic Society|
|State||Published - Nov 2013|
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUK-F1-020-21
Acknowledgements: The authors would like to thank Gary Stakalls and Leroy Grey for technical assistance, a grant from the Army Engineer Research and Development Centre International Research Office (contract no: W911NF-10-1-0438), and EPSRC Science and Innovation Grant Building New Capability in Structural Ceramics (EP/F033605/1) for funding, and Dr. Charles R. Welch for comments on the manuscript. RCM is grateful for funding Award No KUK-F1-020-21, made by King Abdullah, University of Science and Technology (KAUST). SB and ES would like to thank the European Commission (FP7 programme) for the funding (Intra-European Marie Curie Fellowship ACIN and reintegration grant BISM). NN would like to thank the UK Engineering and Physical Sciences Research Council for the funding (EPSRC Doctoral Prize Fellowship).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.