高能球磨法制备高性能均一分散CNTs/Al5083复合材料

采用卧式高能球磨法制备0%~2%CNTs/Al5083(质量分数)复合材料,研究球磨时间和CNTs含量对复合材料性能的影响。采用扫描电镜(SEM)和透射电镜(TEM)对复合材料的形貌进行表征,测试复合材料的抗拉强度及硬度。结果表明:当球磨时间为1.5h时,CNTs可均匀分散在Al5083基体中;CNTs质量分数为1.5%时,CNTs/Al5083界面结合力最好,复合材料的抗拉强度和硬度分别为188.8MPa和136HV,比未加CNTs的Al5083合金基体分别提高了32.2%和36%。

CNTs/Al5083 Composites of High-performance Uniform and Dispersion Fabricated by High-energy Ball-milling

Carbon nanotubes (CNTs,mass fraction of 0％-2％) reinforced Al5083 composites were fabricated by horizontal high-energy ball milling.The effects of ball milling time and CNTs contents on the properties of composite materials were studied.The micro morphology of CNTs/Al5083 composites was characterized by scanning electron microscopy(SEM) and transmission electron microscopy(TEM),the tensile strength and microhardness of the composites were tested.The results indicate that after high-energy ball milling for 1.5h,the carbon nanotubes are dispersed homogeneously in the Al5083 matrix,and good interfacial bonding strength between CNTs and Al5083 is obtained at the addition of 1.5％ CNTs.Under these conditions,the tensile strength and microhardness of CNTs/ Al5083 composites are 188.8MPa and 136HV,respectively.Compared to Al5083 matrix without CNTs reinforcement,tensile strength and microhardness of CNTs/Al5083 composites are increased by 32.2 ％ and 36 ％,respectively.