将原位化学气相沉积法合成的碳纳米管(CNTs)与铝的复合粉末进行球磨混合,进而粉末冶金制备CNTs/Al复合材料,研究球磨工艺对复合材料的微观组织和力学性能的影响.结果表明:球磨过程中不添加过程控制剂所得到的复合材料力学性能优异;随着球磨时间的增加,CNTs逐步分散嵌入铝基体内部,复合材料的组织也变得更加致密均匀.CNTs/Al复合材料的硬度和抗拉强度均随球磨时间的延长持续增加,但是伸长率先增后减.经90min球磨的CNTs/Al复合材料展现了强韧兼备的特点,其硬度和抗拉强度较原始纯铝提高了1.4倍和1.7倍,并且具有17.9%的高伸长率.%Carbon nanotube (CNT) reinforced aluminum matrix composites were fabricated by powder metallurgy route, including in-situ chemical vapor deposition synthesis and ball-milling process.The effect of ball-milling process on the microstructure and mechanical properties of CNT/Al composites was investigated.The results show that the best tensile properties of CNT/Al composites can be achieved without adding any process control agent;with the increment of milling time, CNTs are gradually embedded into Al matrix and the composite microstructure becomes more dense and uniform.The hardness and tensile strength of CNT/Al composites continuously increase with the increase of milling time;however, the elongation firstly increases and then decreases.The composites after 90min of milling show a good balance between strength and ductility, and the hardness and tensile strength of which is 1.4 and 1.7 times higher than that of pure Al respectively, with elongation of 17.9%.
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