School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, People's Republic of China.
Nanotechnology. 2020 Jan 17;31(4):045701. doi: 10.1088/1361-6528/ab49bd. Epub 2019 Oct 1.
Copper matrix composites reinforced by copper foams with uniformly embedded carbon nanotubes (CNTs) were prepared by electrodeposition and spark plasma sintering (SPS). The microstructure and mechanical properties of the composite foams and bulk composites were characterized or tested by Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and tensile tester, respectively. The results show that the CNTs are uniformly dispersed and embedded in the copper foams by electrodeposition, which preserve as reinforcing skeletons in the subsequent SPS sintered composites. Significant improvements of the tensile strength up to 341.32 MPa and the elongation value of 35.59% are obtained for the CNTs/Cu foam reinforced copper composites, showing a simultaneous achievement of high strength and high ductility with such a three-dimensional skeleton reinforced composite structure. The strengthening mechanisms are also discussed.
通过电沉积和火花等离子烧结（SPS）制备了由铜泡沫均匀嵌入碳纳米管（CNT）增强的铜基复合材料。采用拉曼光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和拉伸试验机分别对复合泡沫和整体复合材料的微观结构和力学性能进行了表征和测试。结果表明，通过电沉积，CNT 均匀分散并嵌入在铜泡沫中，在随后的 SPS 烧结复合材料中保留为增强骨架。对于 CNT/Cu 泡沫增强铜复合材料，拉伸强度提高到 341.32 MPa，伸长率达到 35.59%，实现了高强度和高延展性的同时获得，具有这种三维骨架增强复合结构。还讨论了强化机制。
