Structural and chemical stability of multiwall carbon nanotubes in sintered ceramic nanocomposite

Inam, Fawad, Yan, Haixue, Reece, Michael and Peijs, Ton (2010) Structural and chemical stability of multiwall carbon nanotubes in sintered ceramic nanocomposite. Advances in Applied Ceramics, 109 (4). pp. 240-247. ISSN 1743-6753

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The structural and chemical stability of multiwall carbon nanotubes (MWNTs) in ceramic nanocomposites prepared by spark plasma sintering was studied. High resolution electron microscopy, X-ray diffraction and Raman spectroscopy were used to evaluate any degradation of the MWNTs. They were found to be well preserved in alumina after sintering up to 1900°C/100 MPa/3 min. In boron carbide, structural degradation of MWNTs started from 1600°C when sintered for 20 min. Multiwall carbon nanotubes maintained their high aspect ratio and fibrous nature even after being sintered in boron carbide at 2000°C for 20 min. However, no Raman vibrations of MWNTs were observed for nanocomposites processed at temperatures 2000°C, which indicates that they were severely degraded. Structural preservation of MWNTs in ceramic nanocomposites depends on the ceramic matrix, sintering temperature and dwell time. Multiwall carbon nanotubes were not preserved for matrices that require high sintering temperatures (>1600°C) and longer processing times (>13 min).

Item Type: Article
Uncontrolled Keywords: Carbon nanotubes, ceramic nanocomposite, spark plasma sintering
Subjects: F200 Materials Science
H300 Mechanical Engineering
J300 Ceramics and Glasses
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Fawad Inam
Date Deposited: 24 May 2013 15:18
Last Modified: 13 Oct 2019 00:30

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