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Thermal and electrical transport along MWCNT arrays grown on Inconel substrates

Published online by Cambridge University Press:  31 January 2011

Sunil K. Pal
Affiliation:
Mechanical, Aerospace, & Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180
Youngsuk Son
Affiliation:
Mechanical, Aerospace, & Nuclear Engineering, and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180
Theodorian Borca-Tasciuc*
Affiliation:
Mechanical, Aerospace, & Nuclear Engineering, and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180
Diana-Andra Borca-Tasciuc
Affiliation:
Mechanical, Aerospace, & Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180
Swastik Kar
Affiliation:
Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180
Robert Vajtai
Affiliation:
Materials Science and Engineering and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180
Pulickel M. Ajayan
Affiliation:
Materials Science and Engineering and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180
*Corresponding
a)Address all correspondence to this author. e-mail: borcat@rpi.edu
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Abstract

This work reports on thermal and electrical conductivities and interface resistances for transport along aligned multiwalled carbon nanotubes (CNT) films grown on a nickel superalloy (Inconel) substrate. The measured specific thermal resistance of the combined Inconel–CNT and indium–CNT interfaces is of the same order as reported for CNT and silicon or SiO2 interfaces but much higher than theoretical predictions considering perfect contact between the tubes and substrate. Imperfect mechanical contact with the substrate and a large contribution caused by indium–CNT interface are thought to be mainly responsible for the high interface resistances and the low effective values of thermal and electrical conductivities. However, reported results represent an incentive for further research on CNT synthesis on metallic substrates for thermal management applications and pave the way for much easier integration of carbon nanotubes in electronic applications.

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Copyright
Copyright © Materials Research Society 2008

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Thermal and electrical transport along MWCNT arrays grown on Inconel substrates
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