Journal
JOURNAL OF COMPOSITE MATERIALS
Volume 47, Issue 18, Pages 2249-2256Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998312456891
Keywords
Metal-matrix composites; electrical properties; mechanical properties; thermal properties; powder processing
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Funding
- Korea Science and Engineering Foundation [2010-0016139]
- Second Stage of Brain Korea 21 Project
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Aluminum-based composites containing multi-walled carbon nanotubes are produced by a powder metallurgy route involving a ball-milling technique. Effects of processing parameters on the dispersion of multi-walled carbon nanotubes and resulting properties are investigated. Multi-walled carbon nanotubes, initially located on the powder surface with maintaining their connectivity, become dispersed individually and embedded progressively in the aluminum powder during a milling process. The composite with individually dispersed multi-walled carbon nanotubes shows a good strength but poor electrical and thermal conductivities. On the other hand, the composite with a network structure of MWCNTs reveals much enhanced electrical conductivity of 3.316x10(7)Sm(-1) and thermal conductivity of 172W/mK.
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