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采用搅拌摩擦加工方法(FSP),分别将多层石墨烯(GNSs)和无电镀铜Si C颗粒/石墨烯添加进6061-T651铝合金,制备出两种铝基复合材料。通过光学显微镜、纳米压痕仪对比分析母材和两种铝基复合材料的硬度和弹性模量,利用扫描电镜(SEM)和能量色散谱(EDS)研究增强相与母材的融合情况。研究表明:多层石墨烯增强材料的硬度达到母材的121.3%,但存在增强相分布不均匀现象;无电镀铜石墨烯增强材料对母材的增强效果较明显,硬度达母材的136.1%;无电镀铜石墨烯颗粒搅拌进入铝母材后,铜镀层扩散到Si C颗粒周围,使增强相与母材牢固联接。
Two types of aluminum matrix composites were prepared by friction stir processing (FSP), adding multilayer graphene (GNSs) and electroless copper Si C particles / graphene into 6061-T651 aluminum alloy, respectively. The hardness and elastic modulus of the base metal and the two aluminum matrix composites were analyzed by optical microscope and nanoindenter. The SEM and energy dispersive spectroscopy (EDS) were used to study the fusion of the reinforcing phase and the base metal. The results show that the hardness of the multi-layer graphene reinforced material reaches 121.3% of the base metal, but there is an uneven distribution of the reinforcing phase. The reinforcement effect of the electroless copper-graphene reinforced material on the base metal is more obvious. The hardness reaches 136.1% ; Electroless copper graphene particles stirred into the aluminum base material, the copper coating diffused around Si C particles, so that the reinforcing phase and the base material firmly connected.