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    • Keywords


      Carbon nanotubes; copper; nanocomposites; electrical conductivity; microhardness.

    • Abstract


      In the present study, carbon nanotube reinforced copper nanocomposites were fabricated using the powder metallurgy technique which includes ball milling and hot pressing. The carbon nanotube weight percentage in the nanocomposite was varied from 0.25 to 1.50% in the steps of 0.25%. Further, to improve theinterfacial bonding between the carbon nanotubes and copper matrix, the carbon nanotubes were coated with silver using the electroless deposition method. The sintered and hot pressed copper nanocomposites with uncoated and silver-coated carbon nanotubes were subjected to optical and scanning electron microscope studies to understand the dispersion of nanotubes. The density, microhardness and electrical conductivity of developed nanocomposites were studied. The dispersion of nanotubes was found to be uniform throughout the copper matrix resulting in the improvement in microhardness. Especially when compared with sintered samples, the hot-pressed nanocomposites with silver-coated carbon nanotubes showed significant improvement in microhardnesshowever beyond 0.75% content the microhardness for samples was found to drop. The electrical conductivity of nanocomposites was found to decrease with the increase in the MWCNT content which was attributed to the clustering of MWCNTs due to strong van der Waal forces and the increase in the number ofinterfaces between MWCNTs and copper matrix.

    • Author Affiliations



      1. Department of Mechanical Engineering, Ramaiah Institute of Technology, Bengaluru 560054, India
      2. Department of Mechanical Engineering, Indian Institute of Technology (ISM), Dhanbad 826004, India
      3. Department of Mechanical Engineering, Government Sri Krishnarajendra Silver Jubilee Technological Institute, Bengaluru 560001, India
      4. Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, India
      5. Department of Mechanical Engineering, PES University, Bengaluru 560085, India
    • Dates

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