中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 26 No. 12 December 2016 |
（1. Advanced Composites Research Centre, P E S Institute of Technology, Bangalore 560085, India;
2. Department of Mechanical Engineering, Government Engineering College, K.R. Pet 571426, India;
3. Department of Mechanical Engineering, Alliance College of Engineering & Design, Alliance University, Anekal, Bangalore 562106, India;
4. Department of Mechanical Engineering, CMR Institute of Technology, Bangalore 560037, India;
5. Department of Mechanical Engineering, DayanandaSagar College of Engineering, Bangalore 56078, India;
6. Department of Mechanical Engineering, School of Engineering and Technology, Jain University, Bangalore, India）
Abstract:Microstructure and tribological properties of copper-based hybrid nanocomposites reinforced with copper coated multiwalled carbon nanotubes (MWCNTs) and silicon carbide (SiC) were studied. Carbon nanotube was varied from 1% to 4% with silicon carbide content being fixed at 4%. The synthesis of copper hybrid nanocomposites involves ball milling, cold pressing and sintering followed by hot pressing. The developed hybrid nanocomposites were subjected to density, grain size, and hardness tests. The tribological performances of the nanocomposites were assessed by carrying out dry sliding wear tests using pin-on-steel disc tribometer at different loads. A significant decrease in grain size was observed for the developed hybrid composites when compared with pure copper. An improvement of 80% in the micro-hardness of the hybrid nanocomposite has been recorded for 4% carbon nanotubes reinforced hybrid composites when compared with pure copper. An increase in content of CNTs in the hybrid nanocomposites results in lowering of the friction coefficient and wear rates of hybrid nanocomposites.
Key words: copper; carbon nanotubes (CNTs); SiC; microhardness; wear mechanisms; nanocomposite
