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An Overview of Key Challenges in the Fabrication of Metal Matrix Nanocomposites Reinforced by Graphene Nanoplatelets

机译:石墨烯纳米片增强金属基纳米复合材料制备中的关键挑战概述

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This article provides an overview of research efforts with an emphasis on the fabrication of metal matrix nanocomposites (MMNCs) reinforced by graphene nanoplatelets (GNPs). Particular attention is devoted to finding the challenges in the production of MMNCs through the powder metallurgy techniques. The main technical challenges can be listed as: (I) reinforcement selection; (II) dispersion of reinforcement within the matrix; (III) reactivity between the reinforcement and matrix; (IV) interfacial bonding; (V) preferred orientation of reinforcement. It is found that some of these difficulties can be attributed to the nature of the materials involved, while the others are related to the preparation routes. It is reported that the challenges related to the process can often be addressed by changing the production process or by using post-processing techniques. More challenging issues instead are related to the composition of the matrix and reinforcement, their reactivity and the dispersion of reinforcement. These topics still bring significant challenges to the materials scientists, and it would be worth mentioning that the fabrication of MMNCs with a uniform dispersion of reinforcement, strong interfacial bonding, without detrimental reactions and improved isotropic properties is still a puzzling issue.
机译:本文概述了研究工作,重点介绍了由石墨烯纳米片(GNP)增强的金属基质纳米复合材料(MMNC)的制造。特别关注通过粉末冶金技术发现制造MMNC的挑战。主要的技术挑战可以列为:(I)加固选择; (II)增强物在基体内的分散; (III)增强材料与基体之间的反应性; (四)界面结合; (五)钢筋的首选取向。发现这些困难中的一些可以归因于所涉及的材料的性质,而其他困难与制备途径有关。据报道,与过程有关的挑战通常可以通过改变生产过程或使用后处理技术来解决。相反,更具挑战性的问题与基质和增强材料的组成,它们的反应性以及增强材料的分散性有关。这些主题仍然给材料科学家带来巨大挑战,值得一提的是,具有均匀分布的增强材料,牢固的界面结合,无有害反应和改善的各向同性特性的MMNC的制造仍然是一个令人费解的问题。

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