Mechanical properties of Cu-based composites reinforced by carbon nanotubes
(1.Department ofInformation and Electronic Engineering,Zhejiang University, Hangzhou 310027, P.R. China;
2.Department of Materials Science and Engineering,Zhejiang University, Hangzhou 310007, P.R. China)
2.Department of Materials Science and Engineering,Zhejiang University, Hangzhou 310007, P.R. China)
Abstract: Cu-based composites reinforced by 0%~25% (volume fraction) carbon nanotubes were prepared. The fracture behaviors and the rolling properties of the composites and the effects of the volume fraction of the carbon nanotubes were studied.The experimental results show that the fracture toughness of the composites is related to the pulling-out and bridging of the carbon nanotubes in the fracture process.With the volume fraction of the carbon nanotubes increasing, the Vicker’s hardness and the compactness of the composites increase first and then decrease. The peaks of the hardness and the compactness occur at 12%~15% of volume fraction of carbon nanotubes.Some proper ratio of rolling reduction benefits to the comprehensive mechanical properties of the composites.
Key words: Cu-matrix composites; carbon nanotubes; nanotubes content; fracture behavior; rolling