Enhanced strength in bulk graphene-copper composites

被引：287

作者：

Chu, Ke ^{[1
]}

Jia, Chengchang ^{[2
]}

机构：

[1] Lanzhou Jiaotong Univ, Sch Mechatron Engn, Lanzhou 730070, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2014年 / 211卷 / 01期

关键词：

graphene nanoplatelets; metal-matrix composites; powder metallurgy; yield strength; METAL-MATRIX-COMPOSITES; MECHANICAL-PROPERTIES; CARBON NANOTUBES; REINFORCEMENT;

D O I：

10.1002/pssa.201330051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Graphene nanoplatelets (GNPs) exhibit ultra-high strength and elastic modulus. Therefore, they are potential ideal reinforcements in metal-matrix composites (MMCs). In this work, we report the use of GNPs to strengthen the bulk Cu-matrix composites. GNP reinforced Cu-matrix (GNP/Cu) composites were prepared by a combination of the ball milling and hot-pressing processing, and their mechanical properties were investigated. Microstructure studies indicated that the GNPs with 0-8vol.% contents were well dispersed in the Cu matrix by ball milling. Compared to unreinforced Cu, the GNP/Cu composites showed a remarkable increase in yield strength and Young's modulus up to 114 and 37% at 8vol.% GNP content, respectively. The extraordinary reinforcement is attributed to the homogeneous dispersion of GNPs and grain refinement. However, the mechanical improvement of GNP/Cu composites was still below the theoretical value. The possible reasons for this deviation were discussed and the methods for further mechanical improvement of GNP/Cu composites were proposed. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：184 / 190

页数：7

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