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通过机械球磨和热挤出的方法制备碳纳米管(CNTs)增强铝基复合材料。在2024铝合金中加入1%CNTs,并在不同条件下进行球磨。通过X射线衍射仪(XRD)、场发射扫描电镜(FESEM)以及力学性能测试等方法对球磨过的粉末和块体材料的显微组织的变化和力学性能进行测试。研究碳纳米管浓度和球磨时间对CNTs/Al-2024复合材料显微组织的影响。通过对显微组织的观察,讨论粉末在球磨过程中的变形行为。结果表明:在CNTs含量相同的条件下,粉末颗粒尺寸随着球磨时间和转速的增加而减小,当球磨时间达到15 h,粉末颗粒尺寸最小。由于CNTs的加入,铝合金复合材料的拉伸性能有所提高。
Carbon nanotubes (CNTs) reinforced aluminum matrix composites were prepared by mechanical milling and hot extrusion. 1% CNTs was added to 2024 aluminum alloy and ball milled under different conditions. The microstructural changes and mechanical properties of the milled powders and bulk materials were tested by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and mechanical properties testing. The effects of carbon nanotube concentration and milling time on the microstructure of CNTs / Al-2024 composites were investigated. Through the observation of the microstructure, the deformation behavior of the powder during ball milling was discussed. The results show that with the same CNTs content, the particle size decreases with the increase of milling time and rotation speed. When the ball milling time reaches 15 h, the particle size is the smallest. Due to the addition of CNTs, the tensile properties of aluminum alloy composites have been improved.