High ampacity of superhelix graphene/copper nanocomposite wires by a synergistic growth-twisting-drawing strategy
| Autor: | Kai Zhao, Peishuang Xiao, Tengfei Zhang, Yongsheng Chen, Zhen Ge, Yanfeng Ma, Ren Ai, Yang Yang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nanocomposite
Fabrication Materials science Graphene Superhelix chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper 0104 chemical sciences law.invention chemistry Electrical resistivity and conductivity law Volume fraction General Materials Science Composite material 0210 nano-technology Ductility |
| Zdroj: | Carbon. 141:198-208 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2018.09.040 |
| Popis: | Nanocarbon materials can provide effective reinforcement to a surrounding composite matrix. However, the fabrication of nanocarbon/metal composites with superior comprehensive properties remains challenging. Here, we developed a simple cyclic growth-twisting-drawing method to fabricate superhelix graphene/copper nanocomposite wires composed of massive, strongly bonded, and super-helically arranged fine copper fibers with interfacial graphene layers. The obtained nanocomposite wires with a small graphene volume fraction of ∼0.32% exhibit a largely improved current carrying capacity of 5.8 × 1010 A m−2, ∼2.6 times of that of pure copper wires. Furthermore, the electrical conductivity, 5.01 × 107 S m−1, is comparable to that of pure copper. These nanocomposite wires also exhibit improved strength and ductility, 10% and 80% increases compared with that of pure copper wires. These multiple enhanced properties can be attributed to the microscopic superhelix structure with the interfacial graphene layers embedded in the entire multi-level structure. With their largely improved current carrying capacity and mechanical reinforcement, these highly electrically conductive nanocomposite wires promise widely potential applications in the areas of heavy duty, high power electronics and electricity transmission. |
| Databáze: | OpenAIRE |
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