搅拌摩擦加工法制备石墨烯/铝基复合材料及其性能研究

Graphene-reinforced Aluminum Matrix Composites Prepared by Friction Stir Processing

利用搅拌摩擦加工(FSP)法制备了石墨烯/铝基复合材料,通过光镜、SEM+EDS、拉曼光谱和XRD等分析手段对复合材料中石墨烯分散、损伤以及石墨烯-铝界面反应等进行了表征,研究了不同石墨烯加入量对复合材料力学性能的影响。结果表明:石墨烯/铝基复合材料的FSP制备能有效降低界面反应并促进石墨烯片层剥离,但同时也会导致石墨烯结构损伤的加剧。石墨烯在基体中的分散与其加入量密切相关,更多的石墨烯加入会导致其团聚和片层堆砌而影响复合材料的延伸率,合适的加入量可实现对铝基的同时增强增韧。

In this paper,graphene-reinforced aluminum matrix composites were prepared by friction stir pocessing(FSP).The graphene distribution and defect were analyzed by OM,SEM+EDS and raman spectra,and the interface reaction between graphene and alumium was analyzed by XRD.The mechanical properties of the composites with difference graphene adding amount were studied.The results show that the interface reaction could be effectively reduced,and the graphen could be exfoliated further under the action of FSP force.Meanwhile,the graphene structure of graphene was destroyed gradually during the process of FSP.The graphene distribution in the aluminum matrix was closely related to the graphene adding amout,and more addition leads to the aggregation and stacking of the graphene layers,which affects the mechanical properties of the composites,especially the elongation.The simultaneous strengthening and toughening could be obtained by the appropriate graphene addition amount.