Ding Yunpeng, Shi Zhiai, Li Zhiyuan, Jiao Sijia, Hu Jinbiao, Wang Xulei, Zhang Yizhuang, Wang Hanying, Guo Xiaoqin
School of Materials, Zhengzhou University of Aeronautics, Zhengzhou 450046, China.
Nanomaterials (Basel). 2022 Jul 15;12(14):2432. doi: 10.3390/nano12142432.
Carbon nanotubes (CNTs) reinforced magnesium matrix composites have great application potential in the transportation industry, but the low absolute strength is the main obstacle to its application. In this paper, copper-coated CNTs and AZ61 powder were used as raw materials to prepare CNTs/refined-AZ61 composites with good interfacial bonding, uniformly dispersed CNTs and fine grains by the process of ball milling refinement of AZ61 powder, ball milling dispersion and hot-pressing sintering. When the volume fraction of CNTs is less than or equal to 1 vol.%, CNTs can be uniformly dispersed and the yield strength and compressive strength of composites increase with higher CNT content. When the volume fraction of CNTs is 1 vol.%, the compressive strength and yield strength of composites reach 439 MPa and 361 MPa, respectively, which are 14% and 9% higher than those of matrix composites with nearly the same value of fracture strain. When the volume fraction of CNTs is greater than 1 vol.%, with the increase in CNT content, CNT clustering becomes more and more serious, resulting in a decrease in the strength and fracture strain of composites.
碳纳米管（CNTs）增强镁基复合材料在交通运输行业具有巨大的应用潜力，但绝对强度较低是其应用的主要障碍。本文以镀铜碳纳米管和AZ61粉末为原料，通过AZ61粉末球磨细化、球磨分散和热压烧结工艺制备了界面结合良好、碳纳米管均匀分散且晶粒细小的碳纳米管/细化AZ61复合材料。当碳纳米管的体积分数小于或等于1 vol.%时，碳纳米管能够均匀分散，复合材料的屈服强度和抗压强度随碳纳米管含量的增加而提高。当碳纳米管的体积分数为1 vol.%时，复合材料的抗压强度和屈服强度分别达到439 MPa和361 MPa，比断裂应变值相近的基体复合材料分别提高了14%和9%。当碳纳米管的体积分数大于1 vol.%时，随着碳纳米管含量的增加，碳纳米管团聚越来越严重，导致复合材料的强度和断裂应变降低。
Zotero 插件
