Structural stability studies of graphene in sintered ceramic nanocomposites

Inam, Fawad, Vo, Thuc and Bhat, Badekai Ramachandra (2014) Structural stability studies of graphene in sintered ceramic nanocomposites. Ceramics International, 40 (10 B). pp. 16227-16233. ISSN 0272-8842

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Abstract

The post-sintering structural stability of graphene in alumina nanocomposites synthesised by Spark Plasma Sintering (SPS) and Hot Pressing (HP) was compared. Raman spectroscopy, thermogravimetric analyses and electrical conductivity analyses were conducted to characterise degradation of graphene due to the utilisation of different sintering techniques and conditions. Scanning Electron Microscopy confirmed good dispersion of graphene in SPSed and HPed sample. Graphene in SPSed and HPed nanocomposite samples sintered using longer durations (60 min) were found to possess higher crystallinity, thermal stability and electrical conductivity as compared to SPSed samples sintered using shorter sintering durations (10–20 min). This was attributed to the thermally induced graphitisation caused by longer sintering durations, which was lacking in SPSed samples processed using shorter sintering durations and lower temperature. No additional effect of DC pulsed current on the structural stability of graphene for nanocomposites were observed for samples prepared by SPS.

Item Type:	Article
Additional Information:	Published online first 18/7/2014.
Uncontrolled Keywords:	hot pressing, graphene, alumina, structural stability, SPS
Subjects:	F200 Materials Science F300 Physics H300 Mechanical Engineering J300 Ceramics and Glasses
Department:	Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User:	Fawad Inam
Date Deposited:	04 Aug 2014 13:46
Last Modified:	13 Oct 2019 00:38
URI:	http://nrl.northumbria.ac.uk/id/eprint/17332

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