Facile synthesis of high-performance carbon nanosheet/Cu composites from copper formate. (15th September 2020)

• Record Type: Journal Article
• Authors: Shi, Zhendong; Sheng, Jie; Yang, Ziyue; Liu, Zhaoyuan; Chen, Shi; Wang, Miao; Wang, Lidong; Fei, Weidong
• Is Part Of: Carbon. Volume 165(2020)
• Page Start: 349
• Page End: 357
• Publication Date: 2020-09-15
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2020.04.061
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Recently, much research has been reported on the fabrication of carbon-nanofiller (e.g., carbon nanotube (CNT), carbon nanosheet (CNS), and graphene)-reinforced copper matrix composites due to their wide potential applications. However, the preparation processes are generally complicated and difficult for commercial applications. Here, we propose a facile method to fabricate CNS-reinforced copper matrix composites by directly pyrolyzing copper formate powder at high temperature and then consolidating by spark plasma sintering. Interestingly, a complex interface consisting of CNSs, Cu nanoparticles, and CuO nanoparticles is found in the composite. The as-sintered CNS/Cu composite containing 0.27 vol% CNSs has a tensile yield strength of 498 ± 2 MPa and an electrical conductivity of 80.8 ± 0.1% International Annealed Copper Standard. The analysis of strengthening mechanism indicates that 51% of the tensile yield strength is contributed by the complex interface. The introduction of H2 during the pyrolyzing copper formate process results in an increase on the elongation and conductivity of CNS/Cu composite. After rolling, the elongation of CNS/Cu composite is as high as 8.5% and the friction coefficient is 0.25. This work provides a new guideline to the facile fabrication and interfacial design of advanced carbon-nanofiller-reinforced metal matrix composites with high performance. Graphical abstract: Image 1