It is a tough issue to design and fabricate discontinuously reinforced metal matrix composites (DRMMCs) with desired mechanical and physical properties. Utilizing nanocarbon materials such as one-dimensional (1D) carbon nanotubes (CNTs), two-dimensional (2D) graphene or their hybrids as reinforcements for DRMMCs is now considered to be a good solution because of their outstanding intrinsic characterizations. In this work, we proposed a novel in-situ space-confined strategy to circumvent the problem of the controllable interconnection and bonding between CNTs and graphene and thus constructed a well-dispersed CNTs embedded in three-dimensional graphene network (3D GN) hybrid structure for fabricating reinforced Cu matrix nanocomposites. The as-obtained 3D GN/CNT hybrids reinforced copper bulk nanocomposites exhibited a significant strengthening efficiency and a more balanced strength vs. ductility relation compared with Cu matrix composites reinforced by single component (CNT or 3D GN) with the same volume fraction.

设计和制造具有所需机械和物理性能的不连续增强金属基复合材料（DRMMC）是一个棘手的问题。由于一维（1D）碳纳米管（CNT），二维（2D）石墨烯或它们的杂化体等纳米碳材料作为DRMMC的增强材料，因其出色的固有特性，现在被认为是一种很好的解决方案。在这项工作中，我们提出了一种新颖的原位通过空间限制策略来避免CNT与石墨烯之间可控的互连和键合问题，从而构建了嵌入三维石墨烯网络（3D GN）杂化结构中的分散良好的CNT，用于制造增强的Cu基纳米复合材料。与由相同体积分数的单组分（CNT或3D GN）增强的Cu基复合材料相比，所获得的3D GN / CNT杂化增强的铜本体纳米复合材料表现出显着的增强效率和更平衡的强度与延展性之间的关系。