Enhanced mechanical and electrical properties of multi-walled carbon nanotubes reinforced Cu/Ti3SiC2/C nanocomposites via high-pressure torsion

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2024-12-01 DOI:10.1016/S1003-6326(24)66654-9

Zi-xuan WU , Pei-fan ZHANG , Xiao-song JIANG , Hong-liang SUN , Yan-jun LI , Pål CHRISTIAN , Liu YANG

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Abstract

In order to achieve combined mechanical and electrical properties, multi-walled carbon nanotubes (MWCNTs) reinforced Cu/Ti₃SiC₂/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 3.42×10⁷ 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.

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高压扭转增强多壁碳纳米管增强Cu/Ti3SiC2/C纳米复合材料的力学和电学性能

为了使多壁碳纳米管（MWCNTs）增强Cu/Ti3SiC2/C纳米复合材料具有良好的力学和电学性能，采用高压扭转（HPT）工艺对其进行了进一步加工。添加1 wt.% MWCNTs后，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，分别比原始样品高43.9%和39.5%。在MWCNTs含量相同的情况下，其电导率达到3.42×107 S/m，比原样品提高了78.1%。机械性能和电气性能的协同改善归因于获得的微观结构的均匀化和细化程度的提高，以及界面结合的改善和孔隙率的降低。强化机制包括力学性能的分散和细化强化，以及电学性能的电子散射减少。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.