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Thermal expansion behavior of CNT/Ag nanocomposite

  • Hemant Pal , Vimal Sharma and Manjula Sharma
Published/Copyright: June 1, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 6

Abstract

In the present study, the molecular level mixing method has been extended to fabricate carbon nanotube based silver nanocomposite. Here, the influence of types of carbon nanotubes and their functionalization on the coefficient of thermal expansion was examined. Covalently and non-covalently functionalized single wall as well as multiwall carbon nanotubes were used in the synthesis process. The microstructural features of the composite revealed that the carbon nanotubes decorated with silver nanoparticles were dispersed embedded and anchored in the silver matrix. Experimental results confirmed that the coefficient of thermal expansion of the composite reduces in relation to that of pure silver, with increasing content of carbon nanotubes in the silver matrix. The thermal expansion of nanocomposites, up to 6 volume percent of nanotubes, reduces to 50 – 60 % that of pure silver. However, more reduction in thermal expansion of silver nanocomposite with single wall carbon nanotube than with multiwall nanotubes has been observed, which is correlated with high aspect ratio and large effective surface area of single wall nanotubes. Moreover, covalently functionalized multiwall nanotubes exhibit more reinforcing effect than non-covalently functionalized. We believe that strong bonding between carbon nanotubes and metal matrix due to covalent functionalization is responsible for effective reduction in thermal expansion.

Keywords: Carbon nanotubes; Metal matrix nanocomposites; Coefficient of thermal expansion; Functionalization
*Correspondence address, Dr. Vimal Sharma, Asstt. Professor, Deptt. of Physics, NIT-Hamirpur (H.P.), Hamirpur, 177005, India, Tel.: +91 94 592275085, Fax: +91 197 2254106, E-mail:

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Received: 2013-08-09
Accepted: 2014-01-28
Published Online: 2014-06-01
Published in Print: 2014-06-12

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111075
Keywords for this article
Carbon nanotubes; Metal matrix nanocomposites; Coefficient of thermal expansion; Functionalization

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Thermodynamic modeling of the In–Pt–Sb system
  5. Classical controlled rolling of low C steels microalloyed with Ti and Mo
  6. Development of carbide intermetallic layer by electric discharge alloying on AISI-D2 tool steel and its wear resistance
  7. Comparison of fatigue crack growth rate of selective laser sintered RapidSteel via computational fracture mechanics
  8. Wear resistance and fracture mechanics of WC–Co composites
  9. Thermal expansion behavior of CNT/Ag nanocomposite
  10. Thermophysical properties of solid phase rhodium measured by the pulse calorimetry technique over a wide temperature range
  11. Influence of Co3O4 addition on the ionic conductivity and microstructural properties of yttria-stabilized zirconia (8YSZ)
  12. High-activity of Pd catalyst supported on antimony tin oxide for hydrogen peroxide electroreduction
  13. Investigation of low k interfacial layer characteristics of LaAlO3 thin films grown on Si (100)
  14. In-situ catalytic growth of MgAl2O4 spinel whiskers in MgO–C refractories
  15. Short Communications
  16. Preparation and characterization of boron nitride/carbon fiber composite with high specific surface area
  17. Crevice corrosion resistance of high alloyed materials in 3.5 % NaCl solution
  18. Effect of grain size on the microstructure and mechanical properties of Mg-4Y-3Nd-0.5Zr alloy
  19. People
  20. Professor Ulrich Martin on his 65th birthday
  21. DGM News
  22. DGM News
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