Zheng Zhong, Liu Jishi, Tao Jiafeng, Li Jing, Zhang Wenqian, Li Xiuhong, Xue Huan
School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China.
Nanomaterials (Basel). 2021 Nov 6;11(11):2982. doi: 10.3390/nano11112982.
The effects of electroless coatings on the microstructure and composition of the interface between multi-walled carbon nanotubes (MWCNTs) and a Cu matrix and the mechanical properties and wear behavior of the resulting copper matrix composites were investigated. Ni and Cu coatings were electrolessly plated on MWCNTs and mixed subsequently with copper powder. Then copper matrix composites were prepared by sintering, hot extrusion and cold drawing processes. The results showed that MWCNTs were straight, long, uniformly dispersed and aligned in the composites. The Ni coating is more continuous, dense and complete than a Cu coating. The tensile strength, compressive strength, microhardness and tribological properties of Ni@MWCNTs/Cu composite along the drawing direction were enhanced most. The ultimate tensile strength and compressive strength were 381 MPa and 463 MPa, respectively. The friction coefficient and wear rate were reduced by 59% and 77%, respectively, compared with pure Cu samples. This study provides a new insight into the regulation of tribological properties of composites by their interface.
研究了化学镀层对多壁碳纳米管（MWCNTs）与铜基体界面的微观结构和成分的影响，以及所得铜基复合材料的力学性能和磨损行为。在MWCNTs上化学镀镍和铜涂层，随后与铜粉混合。然后通过烧结、热挤压和冷拉工艺制备铜基复合材料。结果表明，MWCNTs在复合材料中呈直的、长的、均匀分散且排列的状态。镍涂层比铜涂层更连续、致密和完整。沿拉伸方向的Ni@MWCNTs/Cu复合材料的拉伸强度、抗压强度、显微硬度和摩擦学性能提高最为显著。极限抗拉强度和抗压强度分别为381MPa和463MPa。与纯铜样品相比，摩擦系数和磨损率分别降低了59%和77%。本研究为通过复合材料界面调控其摩擦学性能提供了新的见解。
