Graphene defect engineering for optimizing the interface and mechanical properties of graphene/copper composites
Graphene defect engineering for optimizing the interface and mechanical properties of graphene/copper composites
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用于优化石墨烯/铜复合材料界面和机械性能的石墨烯缺陷工程
DOI：
10.1016/j.carbon.2018.08.004
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发表时间：
2018-12-01
期刊：
影响因子：
10.9
通讯作者：
Geng, Zhong-rong
中科院分区：
文献类型：
--
作者：
Chu, Ke;Wang, Jing;Geng, Zhong-rong
本文提出了一种石墨烯缺陷工程策略，以调整石墨烯/铜复合材料的界面和力学性能。等离子体处理用于在起始石墨烯材料的基面上产生表面缺陷（5-10 nm纳米孔），但不会显著损坏石墨烯结构。结果表明，等离子体处理后的石墨烯在烧结过程中原位生成了CuxOy氧化物，起到了桥接作用，增强了石墨烯与Cu基体的界面结合力。与未处理的石墨烯相比，具有等离子体处理的石墨烯的复合材料表现出更高的强度增强，以及响应于热循环的更好的界面稳定性，这归因于CuxOy协调的改善的界面结合，其提供了有效的载荷传递和热应力松弛。然而，过长的等离子体处理可能严重损坏石墨烯结构并导致强度增强降低。研究表明，石墨烯的合理缺陷工程化是优化石墨烯/金属复合材料界面和力学性能的有效途径。(C)2018爱思唯尔有限公司版权所有。
A graphene defect engineering strategy was proposed in this work to tailor the interface and mechanical properties of graphene/Cu composites. Plasma treatment was used to create surface defects (5-10 nm nanopores) on the basal-plane of starting graphene material but without considerably damaging the graphene structure. It was demonstrated that the CuxOy oxides were in situ formed at the defect sites of plasma-treated graphene in the sintering process, which played a bridging role in enhancing the interfacial adhesion of graphene with Cu matrix. Compared to the composites with untreated graphene, the composites with plasma-treated graphene exhibited a higher strength enhancement, and better interface stability in response to thermal cycling, which was ascribed to the CuxOy coordinated improved interfacial bonding that provided efficient load transfer and thermal stress relaxation. Nevertheless, the overlong plasma treatment could severely damage the graphene structure and result in a reduced strength enhancement. This study suggests that the rational defect engineering of graphene is an efficient approach for optimizing the interface and mechanical properties of graphene/metal composites. (C) 2018 Elsevier Ltd. All rights reserved.