Wang Hongding, Zheng Haitao, Hu Mingshuai, Ma Zhonglei, Liu Hong
School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, People's Republic of China.
Urumqi West Depot, China Railway Urumqi Group Co.Ltd, Urumqi, 830023, People's Republic of China.
Sci Rep. 2024 Jul 13;14(1):16213. doi: 10.1038/s41598-024-67004-x.
In this study, Al6061 alloy matrix composites reinforced AlO-decorated reduced graphene oxide (AlO/RGO) with 0.1, 0.3 and 0.5 weight present (wt%) were successfully fabricated using high energy ball milling and hot extrusion techniques. The microstructures of these AlO/RGO/Al6061 aluminum matrix composites (Al MMCs) were characterized. The results showed that AlO/RGO were uniformly distributed within the Al6061 matrix and tightly bonded to the matrix. AlO encapsulation on RGO surface would prevent the formation of AlC brittle phase in matrix, ensuring that there was no reaction between the reinforcement and the matrix Al6061. Tensile strength and Vickers hardness tests demonstrated that the mechanical properties of Al MMCs significantly increased with addition of AlO/RGOs. Remarkably, Al MMCs with 0.1 wt% reinforcement showed tensile yield and tensile strengths of 270 MPa and 286 MPa, respectively, which were 49% and 43% higher than those of pure Al6061 prepared using the same process. Furthermore, the 0.1 wt% AlO/RGO composite also showed the best plastic deformation capability in considering of the strength.
在本研究中，采用高能球磨和热挤压技术成功制备了分别含有0.1%、0.3%和0.5%（重量百分比）AlO修饰的还原氧化石墨烯（AlO/RGO）增强的Al6061合金基复合材料。对这些AlO/RGO/Al6061铝基复合材料（Al MMCs）的微观结构进行了表征。结果表明，AlO/RGO均匀分布在Al6061基体中，并与基体紧密结合。RGO表面的AlO包覆可防止基体中AlC脆性相的形成，确保增强体与基体Al6061之间不发生反应。拉伸强度和维氏硬度测试表明，随着AlO/RGO的添加，Al MMCs的力学性能显著提高。值得注意的是，添加0.1%增强体的Al MMCs的拉伸屈服强度和拉伸强度分别为270MPa和286MPa，比采用相同工艺制备的纯Al6061分别高出49%和43%。此外，考虑到强度，0.1% AlO/RGO复合材料还表现出最佳的塑性变形能力。
