Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 68, Issue 9, Pages 2178-2183Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2008.04.001
Keywords
ceramic nanocomposites; carbon nanotubes; thermal properties; electron microscopy; chemical vapor deposition
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Carbon nanotube-alumina (CNT-Al2O3) nanocomposites have been synthesized by direct growth of CNTs on alumina by chemical vapor deposition (CVD) and the as-grown nanocomposites were densified by spark plasma sintering (SPS). The thermal properties of carbon nanotube-alumina composites have been investigated as a function of CNT content and the sintering temperature. The notably enhanced thermal properties were achieved including a heat capacity of 6.09J/g K at 400 degrees C in the 19.10 wt% CNT-Al2O3 nanocomposites sintered at 1450 degrees C, a thermal diffusivity of 13.98 mm(2)/s, and a thermal conductivity of 90.44 W/mK in the 7.39 wt% CNT-Al2O3 nanocomposites sintered at 1550 degrees C. Hence, CNTs are considered to be able to form a new generation of engineered CNT-ceramic materials offering extremely improved thermal properties. (c) 2008 Elsevier Ltd. All rights reserved.
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