ABSTRACT The different unzipping levels of carbon nanotubes (CNTs) reinforced CuCr matrix composites were fabricated by flake powder metallurgy. The strengthening effect of the different unzipping levels of CNTs in the metal matrix was investigated through scanning electron microscopy, transmission electron microscopy, and tensile tests. When the CNTs were unzipped to the proper level, the unzipped-CNTs/CuCr composite presented primarily enhanced an ultimate tensile strength of 373.7 MPa and a fracture elongation of 18.6%, respectively. The formation of sufficient interface contact areas and interfacial adhesion between unzipped CNTs and CuCr matrix, which were responsible for trade-off in the strength-ductility of the composites. This work provides an insight to understand the strengthening behaviors of unzipped CNTs in the metal matrix composites. Graphical abstract

中文翻译：

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通过优化界面结构提高部分解压缩碳纳米管增强CuCr基复合材料的强度和延展性

摘要 通过片状粉末冶金法制备了不同解链水平的碳纳米管 (CNTs) 增强的 CuCr 基复合材料。通过扫描电子显微镜、透射电子显微镜和拉伸试验研究了不同解链水平的碳纳米管在金属基体中的强化效果。当碳纳米管拉开到适当的水平时，拉开后的碳纳米管/铜铬复合材​​料的极限拉伸强度分别提高了 373.7 MPa 和断裂伸长率分别提高了 18.6%。在未压缩的碳纳米管和 CuCr 基体之间形成足够的界面接触面积和界面粘附力，这是复合材料强度-延展性的权衡的原因。这项工作为了解金属基复合材料中未压缩的碳纳米管的强化行为提供了见解。图形概要