Abstract
Nanostructured carbide-derived carbons (CDCs) were synthesized from hexagonal SiC (α-SiC) and cubic SiC (β-SiC) powders via chlorination at temperatures between 900 and 1200 °C. The content of the sp2-and sp3-bonded carbon phases and their crystallinity were analyzed by Raman spectroscopy. The nanocrystalline phases of the synthesized CDCs were observed and characterized by transmission electron microscopy and electron energy-loss spectroscopy. The morphology of CDCs showed interesting features that varied with the starting SiC powder. Diamond nanocrystals were more frequently observed in α-SiC-derived carbons than in β-SiC-derived carbons, and the rate of graphitization was affected by the SiC polytype, synthesis temperature and hydrogen content. A possible mechanism responsible for the observed results was also investigated.
Original language | English |
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Pages (from-to) | 19-27 |
Number of pages | 9 |
Journal | Carbon |
Volume | 79 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2014 |
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)