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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Fabrication of three-dimensional graphene/Cu composite by in-situ CVD and its strengthening mechanism
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Fabrication of three-dimensional graphene/Cu composite by in-situ CVD and its strengthening mechanism

机译：原位CVD制备三维石墨烯/ Cu复合材料及其增强机理

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摘要

In this study, a Cu matrix composite is synthesized reinforced by an in-situ three-dimensional graphene network (3D-GN) grown through chemical vapor deposition (CVD). Nano Cu powders and polymethylmethacrylate (PMMA) are employed as matrix and carbon source respectively. PMMA is dispersed on Cu powders after ball-milling. During the CVD process, carbon atoms from pyrolyzed PMMA diffuse and precipitate on Cu powders. By inheriting the morphology of Cu powders, carbon atoms build a 3D-GN in-situ on Cu powders. A bulk 3D graphene/composite with 0.5 wt% graphene is obtained by vacuum hot-press sintering. The favorable interfaces that crucial to the achievement of exceptional mechanical properties of a bulk composite are verified by TEM and SEM characterizations. A yield strength and tensile strength of 290 MPa and 308 MPa respectively are achieved of the composite. The structure of 3D-GN is well preserved in the bulk composite. We demonstrate that the 3D-GN serves as an effective obstacle to the propagation of dislocations by TEM further. (C) 2016 Elsevier B.V. All rights reserved.
机译：在这项研究中，通过通过化学气相沉积（CVD）生长的原位三维石墨烯网络（3D-GN）合成了Cu基复合材料。纳米铜粉和聚甲基丙烯酸甲酯（PMMA）分别用作基质和碳源。球磨后，PMMA分散在铜粉上。在CVD过程中，来自热解PMMA的碳原子扩散并沉淀在Cu粉上。通过继承铜粉的形态，碳原子可在铜粉上原位构建3D-GN。通过真空热压烧结获得具有0.5wt％石墨烯的本体3D石墨烯/复合材料。 TEM和SEM表征验证了对实现块状复合材料优异的机械性能至关重要的有利界面。该复合材料的屈服强度和抗拉强度分别达到290 MPa和308 MPa。 3D-GN的结构在整体复合材料中保留得很好。我们证明3D-GN成为TEM进一步扩展位错的有效障碍。 （C）2016 Elsevier B.V.保留所有权利。

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