Effect of local alloying on interfacial bonding in laminated copper matrix composites reinforced by carbon nanotubes
Effect of local alloying on interfacial bonding in laminated copper matrix composites reinforced by carbon nanotubes
复制标题
局部合金化对碳纳米管增强层状铜基复合材料界面结合的影响
DOI：
10.1016/j.msea.2019.01.013
复制
发表时间：
2019-03-04
期刊：
影响因子：
6.4
通讯作者：
Xiao, Peng
中科院分区：
文献类型：
--
作者：
Jiang, Yihui;Wang, Dan;Xiao, Peng
由于碳纳米管与铜基体之间的界面结合较弱，制备性能优异的碳纳米管增强铜基复合材料是一项具有挑战性的任务。本文采用片状粉末冶金方法，在层合CNTs/Cu复合材料的结合界面中有意添加合金元素钛。由于原位形成TiC和Cu3Ti颗粒中间层，使得复合材料的界面结合得到明显改善。结合结构设计，与含有相同碳纳米管浓度的非合金复合材料相比，局部合金化的0.2 wt% CNTs/Cu-0.5Ti复合材料具有更高的极限抗拉强度（407 +/- 22 MPa）和延展性（9.7%）。由于钛只在界面中局部添加，因此钛的加入对铜基体晶格参数的影响可以忽略不计，整体复合材料的电导率保持在较高的水平。
The fabrication of carbon nanotubes (CNTs)-reinforced copper matrix composites with excellent performances is a challenging task because of the weak interfacial bonding between CNTs and copper matrices. In the present work, an alloying element titanium was intentionally added to the bonding interfaces of laminated CNTs/Cu composites via the flake powder metallurgy method. Due to the in situ formed intermediate layer of TiC and Cu3Ti particles, the interfacial bonding of the composites was significantly improved. In combination with the architecture design, the locally alloyed 0.2 wt% CNTs/Cu-0.5Ti composite exhibits both improved ultimate tensile strength (407 +/- 22 MPa) and ductility (9.7%) compared with the unalloyed composite containing the same CNT concentration. Since titanium was locally added solely to the interface, the inclusion of titanium had a negligible effect on the lattice parameters of the copper matrix, and the electrical conductivities of the bulk composites were maintained at a relatively high level.