(1. Advanced Composites Research Centre (ACRC), P E S Institute of Technology, Bangalore 560085, India;
2. Department of Mechanical Engineering, GEC, K. R. Pet 571426, Karnataka, India;
3. Department of Mechanical Engineering, Atria Institute of Technology, Bangalore 560024, India;
4. Research and Development, Rapsri Engineering Products Company Ltd., Harohalli 562112, India;
5. Department of Mechanical Engineering, Alliance College of Engineering and Design,
Alliance University, Bangalore 562106, India;
6. Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore 560078, India)
摘 要: 通过粉末冶金技术制备多壁碳纳米管(MWCNTs)增强的Cu-Sn合金纳米复合材料。CNTs的质量分数从0以0.5%的增量逐步增加到2%，研究纳米复合材料的密度、硬度、电导率和摩擦磨损行为。结果表明:纳米复合材料的密度随CNTs含量的增加而降低；添加CNTs能显著提高纳米复合材料的硬度；相对于没有增强的合金，纳米复合材料具有低的摩擦因数和更好的耐磨性。当外加负载为5 N时，与Cu-Sn合金相比，含量为2%的多壁碳纳米管增强的Cu-Sn合金纳米复合材料的摩擦因数和磨损量分别降低了72%和68%。报道了复合材料磨损表面的磨损机理。此外，合金的电导率随CNTs含量的增加而降低。
关键字: Cu-Sn合金；碳纳米管；纳米复合材料；粉末冶金；显微组织；干滑动磨损
（1. Advanced Composites Research Centre (ACRC), P E S Institute of Technology, Bangalore 560085, India;
2. Department of Mechanical Engineering, GEC, K. R. Pet 571426, Karnataka, India;
3. Department of Mechanical Engineering, Atria Institute of Technology, Bangalore 560024, India;
4. Research and Development, Rapsri Engineering Products Company Ltd., Harohalli 562112, India;
5. Department of Mechanical Engineering, Alliance College of Engineering and Design,
Alliance University, Bangalore 562106, India;
6. Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore 560078, India）
Abstract:Multiwalled carbon nanotubes (MWCNTs) reinforced Cu-Sn alloy based nanocomposite was developed by powder metallurgy route. The mass fraction of CNTs was varied from 0 to 2% in a step of 0.5%. The developed nanocomposites were subjected to density, hardness, electrical conductivity, and friction and wear tests. The results reveal that the density of nanocomposite decreases with the increase of the mass fraction of CNTs. A significant improvement in the hardness is noticed in the nanocomposite with the addition of CNTs. The developed nanocomposites show low coefficient of friction and improved wear resistance when compared with unreinforced alloy. At an applied load of 5 N, the coefficient of friction and wear loss of 2% CNTs reinforced Cu-Sn alloy nanocomposite decrease by 72% and 68%, respectively, compared with those of Cu-Sn alloy. The wear mechanisms of worn surfaces of the composites are reported. In addition, the electrical conductivity reduces with the increase of the content of CNTs.
Key words: Cu-Sn alloy; carbon nanotube; nanocomposites; powder metallurgy; microstructure; sliding wear
