碳纳米管增强铝合金复合材料的机械球磨工艺过程研究

Mechanical milling process for carbon nanotubes reinforced aluminum alloy composite

研究机械球磨工艺对碳纳米管与铝合金粉末的分散混合过程,以及对最终碳纳米管增强铝合金复合材料性能的影响。结果表明:随着机械球磨时间的延长,碳纳米管被打散并嵌入到铝合金粉末中,且铝合金粉末形态发生了相应变化,同时碳纳米管的石墨结构遭到一定程度破坏,导致烧结过程中形成大量碳化物;当球磨时间为7 h,复合材料的抗拉强度达到最大值,与纯铝合金材料相比提高约37%。

The influence of mechanical milling process on the mixing procedure of carbon nanotubes and aluminum alloy powder,and the mechanical properties of carbon nanotubes reinforced aluminum alloy composites were studied. The results show that with the extension of the milling times,carbon nanotubes are scattered and embedded into the aluminum powder,and the morphologies of aluminum alloy powder change accordingly,while the graphite structure of carbon nanotubes undergoes a certain degree of damage,leading to the formation of a large number of carbides during the afterward sintering process. When the milling time is 7 h,the tensile strength of the composite reaches the maximum,increasing by about 37% compared with that of pure aluminum alloy.