A novel approach for the fabrication of carbon nanofibre/ceramic porous structures

Claudia Walter, Suelen Barg, Na Ni, Robert C. Maher, Esther Garcίa-Tuñón, Muhammad Muzzafar Zaiviji Ismail, Flora Babot, Eduardo Saiz

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

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 languageEnglish (US)
Pages (from-to)2365-2374
Number of pages10
JournalJournal of the European Ceramic Society
Volume33
Issue number13-14
DOIs
StatePublished - Nov 2013
Externally publishedYes

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