石墨烯增强铝基纳米复合材料研究进展

Graphene Reinforced Aluminum Matrix Nanocomposites

石墨烯以其优异力学、物理性能以及独特二维结构成为铝基复合材料的理想纳米增强相。金属基纳米复合材料制备技术快速发展,促进了石墨烯增强铝基纳米复合材料在结构和功能材料领域中的广泛研究。石墨烯在铝基体中的分散以及石墨烯/铝的界面控制问题具有重要科学研究和工程应用价值。重点介绍石墨烯增强铝基纳米复合材料最新研究进展,主要包括石墨烯增强铝基纳米复合材料的分散和冶金成型技术及其结构表征和力学性能研究。实验表明石墨烯能够显著提高铝基体力学性能,但作者认为通过优化工艺参数、改善微观结构和控制结合界面能够进一步优化材料性能。此外,为实现工程应用,还需加强石墨烯增强铝基复合材料的腐蚀性能和热、电性等物理性能研究,并突破材料的低成本、大规模制备技术。本文还基于石墨烯独特二维结构和表面状态,对石墨烯的增强增韧机制进行了深入讨论。

Graphene materials with excellent mechanical and physical properties as well as two-dimensional flexible morphology are ideal reinforcement nanofillers for aluminum matrix nanocomposites.Rapid progress in graphene materials and nanocomposites fabricating technology promotes the development of advanced graphene reinforced aluminum matrix nanocomposites for structural and functional applications.Nevertheless,the dispersion of graphene nanofillers within aluminum matrix and the interfacial controlling between them remain longstanding challenges in the fabrication of graphene reinforced aluminum matrix nanocomposites.This paper focused on the recent development of the fabrication and characterization of graphene reinforced aluminum matrix nanocomposites,including the dispersion and consolidation technology of graphene reinforced aluminum matrix nanocomposites as well as their structural characters and mechanical behaviors.The mechanical performances of aluminum matrix were remarkably enhanced by the introduction of graphene,which can increase further by optimizing process parameters,improving microstructure and controlling interface between aluminum and graphene.Furthermore,in order to realize the engineering application,more investigation should be given on the corrosion,thermal and electrical properties.It is also very important to develop a new method with low cost and large-scale production.As a novel 2-dimension structure and unique surface state of graphene,the reinforcing and toughening mechanism was discussed.