Effect of mechanical alloying time and rotation speed on evolution of CNTs/Al-2024 composite powders  

球磨时间和转速对CNTs/Al-2024复合粉末变化的影响(英文)

作　　者：郝晓宁[1] 张海平[1] 郑瑞晓 张艺镡 Kei AMEYAMA 马朝利[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,空天先进材料与服役教育部重点实验室,北京100191 [2]Department of Mechanical Engineering, Faculty of Science and Engineering, Ritsumeikan University

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第7期2380-2386,共7页中国有色金属学报（英文版）

基　　金：Project(2012CB619503)supported by the National Basic Research Program of China;Project(2013AA031001)supported by the National High-tech Research and Development Program of China;Project(2012DFA50630)supported by the International Science&Technology Cooperation Program of China

摘　　要：Carbon nanotubes （CNTs） reinforced aluminum matrix composites were fabricated by mechanical milling followed by hot extrusion. The commercial Al-2024 alloy with 1% CNTs was milled under various ball milling conditions. Microstructure evolution and mechanical properties of the milled powder and consolidated bulk materials were examined by X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM） and mechanical test. The effect of CNTs concentration and milling time on the microstructure of the CNTs/Al-2024 composites was studied. Based on the structural observation, the formation behavior of nanostructure in ball milled powder was discussed. The results show that the increment in the milling time and ration speed, for a fixed amount of CNTs, causes a reduction of the particle size of powders resulting from MM. The finest particle size was obtained after 15 h of milling. Moreover, the composite had an increase in tensile strength due to the small amount of CNTs addition.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。

关 键 词：CNTS Al matrix composite mechanical milling MICROSTRUCTURE 

分 类 号：TB333[一般工业技术—材料科学与工程]