摘要
In order to achieve combined mechanical and electrical properties,multi-walled carbon nanotubes(MWCNTs)reinforced Cu/Ti_(3)SiC_(2)/C nanocomposites were further processed by high-pressure torsion(HPT).The maximum microhardness values of central and edge from the composites with 1 wt.%MWCNTs reached HV 130.0 and HV 363.5,which were 43.9%and 39.5%higher than those of the original samples,respectively.With the same content of MWCNTs,its electrical conductivity achieved 3.42×10^(7) S/m,which was increased by 78.1%compared with that of original samples.The synergistic improvement of mechanical and electrical properties is attributed to the obtained microstructure with increased homogenization and refinement,as well as improved interfacial bonding and reduced porosity.The strengthening mechanisms include dispersion and refinement strengthening for mechanical properties,as well as reduced electron scattering for electrical properties.
为了获得综合的力学和电学性能,通过高压扭转对多壁碳纳米管增强Cu/Ti_(3)SiC/C纳米复合材料进行进一步加工。含1%(质量分数)多壁碳纳米管复合材料中心和边缘的最大显微硬度值分别达到HV 130.0和HV 363.5,相比原始样品分别提高了43.9%和39.5%。其电导率的最大值达到3.42×10^(7) S/m,相比原始样品提高了78.1%。力学和电学性能的协同提高归因于均匀化和细化的显微组织,以及改善的界面结合和降低的孔隙率。增强机理包括与力学性能相关的弥散和细晶强化,以及与电学性能相关的电子散射的减少。
作者
Zi-xuan WU
Pei-fan ZHANG
Xiao-song JIANG
Hong-liang SUN
Yan-jun LI
Pål CHRISTIAN
Liu YANG
武子轩;张沛帆;蒋小松;孙红亮;李彦军;PÅL CHRISTIAN;杨刘(西南交通大学材料先进技术教育部重点实验室,成都610031;西南交通大学材料科学与工程学院,成都610031;School of Engineering and Materials Science,Queen Mary University of London,London E14NS,United Kingdom;海军航空大学教研保障中心,烟台264001;Department of Materials Science and Engineering,Norwegian University of Science and Technology,Trondheim 7491,Norway;Institute for Applied Materials,Karlsruhe Institute of Technology,Karlsruhe 76131,Germany)
基金
supported by Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics,Chinese Academy of Sciences(No.IIMDKFJJ-21-10)
China Postdoctoral Science Foundation(No.2018T110993).
