This study investigated the effects of adding graphene nanoplates (GNPs) and carbon nanotubes (CNTs) into the Al7075 matrix via the stir casting method on the microstructure and mechanical properties of the fabricated composites. By increasing the volume fraction of reinforcements, the fraction of porosity increased. The X-ray diffraction results showed that the addition of reinforcements into the Al7075 changed the dominant crystal orientation from (002) to (111). Field emission scanning electron microscopy images also showed the distribution of clustered reinforcements in the matrix. Between the two reinforcements, the addition of CNTs generated a lower fraction of porosities. Through the addition of 0.52vol% GNPs into the matrix, the hardness, ultimate tensile strength and uniform elongation increased by 44%, 32%, and 180%, respectively. Meanwhile, the presence of 0.71vol% CNTs in the matrix increased the hardness, tensile strength and uniform elongation by 108%, 129%, and 260%, respectively.

本研究调查了通过搅拌浇铸法将石墨烯纳米片 (GNP) 和碳纳米管 (CNT) 添加到 Al7075 基体中对制备的复合材料的微观结构和机械性能的影响。通过增加增强体的体积分数，孔隙率的分数增加。X 射线衍射结果表明，在 Al7075 中添加增强剂将主要晶体取向从 (002) 改变为 (111)。场发射扫描电子显微镜图像还显示了基体中簇状增强物的分布。在两种增强材料之间，添加碳纳米管产生的孔隙率较低。通过在基体中加入 0.52vol% GNPs，其硬度、极限拉伸强度和均匀伸长率分别提高了 44%、32% 和 180%。