Enhanced strength in bulk graphene-copper composites
Enhanced strength in bulk graphene-copper composites
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DOI：
10.1002/pssa.201330051
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发表时间：
2014-01-01
影响因子：
2
通讯作者：
Jia, Chengchang
中科院分区：
文献类型：
--
作者：
Chu, Ke;Jia, Chengchang
石墨烯纳米片（GNP）表现出超高的强度和弹性模量。因此，它们是金属基复合材料（MMCs）中潜在的理想增强体。在这项工作中，我们报告了使用GNP来加强大块铜基复合材料。采用球磨-热压工艺制备了GNP增强Cu基复合材料，并对其力学性能进行了研究。微观结构研究表明，0-8vol.%通过球磨，使Cu含量均匀分散在Cu基体中。与未增强的Cu相比，GNP/Cu复合材料的屈服强度和杨氏模量在8vol.%时分别达到114和37 GNP的含量。GNP的均匀分散和晶粒细化是增强效果的主要原因。但GNP/Cu复合材料的力学性能仍低于理论值。讨论了造成这种偏差的可能原因，并提出了进一步改善GNP/Cu复合材料力学性能的方法。(C)2013 WILEY-VCH Verlag GmbH & Co. KGaA，魏因海姆
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