(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: 通過粉末冶金技術(shù)制備多壁碳納米管(MWCNTs)增強(qiáng)的Cu-Sn合金納米復(fù)合材料。CNTs的質(zhì)量分?jǐn)?shù)從0以0.5%的增量逐步增加到2%，研究納米復(fù)合材料的密度、硬度、電導(dǎo)率和摩擦磨損行為。結(jié)果表明:納米復(fù)合材料的密度隨CNTs含量的增加而降低；添加CNTs能顯著提高納米復(fù)合材料的硬度；相對(duì)于沒有增強(qiáng)的合金，納米復(fù)合材料具有低的摩擦因數(shù)和更好的耐磨性。當(dāng)外加負(fù)載為5 N時(shí)，與Cu-Sn合金相比，含量為2%的多壁碳納米管增強(qiáng)的Cu-Sn合金納米復(fù)合材料的摩擦因數(shù)和磨損量分別降低了72%和68%。報(bào)道了復(fù)合材料磨損表面的磨損機(jī)理。此外，合金的電導(dǎo)率隨CNTs含量的增加而降低。
關(guān)鍵字: Cu-Sn合金；碳納米管；納米復(fù)合材料；粉末冶金；顯微組織；干滑動(dòng)磨損
（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
