摘要
利用静电自组装和机械搅拌法相结合的工艺制备得到碳纳米管/铝(carbon nanotubes/aluminum,CNTs/Al)复合材料粉体并压坯制成预制块。采用搅拌铸造和热轧相结合的工艺制备得到不同碳纳米管(carbon nanotubes,CNTs)含量的CNTs/Al复合材料。通过扫描电子显微镜(scanning electron microscope,SEM)、X射线衍射仪(X-ray diffractometer,XRD)等表征CNTs/Al的微观组织结构,利用拉伸实验机测试力学性能。通过拉曼光谱仪和傅里叶变换红外光谱仪(Fourier transform infrared spectrometer,FT-IR)对试样进行表征后可知,通过酸化处理成功地在CNTs表面引入了含氧官能团。拉伸试验结果表明:CNTs/Al复合材料的抗拉强度随着CNTs含量的增加先提高后降低;当CNTs质量分数增加到0.3%时抗拉强度达到最大值,为193 MPa;CNTs/Al复合材料的伸长率不断降低,但均为韧性断裂。
Carbon nanotubes/aluminum(CNTs/Al)composite powders were prepared by the combined technology of electrostatic self-assembly and mechanical stirring method,and pressed into preforms.CNTs/Al composites with different carbon nanotubes(CNTs)contents were prepared by the combined technology of stirring casting and hot rolling.The microstructure of CNTs/Al was characterized by scanning electron microscope(SEM)and X-ray diffractometer(XRD),and the mechanical properties were measured by tensile testing machine.After the samples were characterized by Raman spectroscopy and Fourier transform infrared spectrometer(FT-IR),it can be known that the oxygen-containing functional groups are successfully introduced into the surface of CNTs by acidification.The tensile test results show that the tensile strength of CNTs/Al composites first increases and then decreases with the increase of CNTs content.When the mass fraction of CNTs increases to 0.3%,the tensile strength reaches the maximum value of 193 MPa.The elongations of CNTs/Al composites decrease continuously,but they all show ductile fracture.
作者
吴键
邵国森
何代华
陈小红
刘平
张柯
WU Jian;SHAO Guosen;HE Daihua;CHEN Xiaohong;LIU Ping;ZHANG Ke(School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《有色金属材料与工程》
2022年第1期11-17,39,共8页
Nonferrous Metal Materials and Engineering
基金
国家自然科学基金资助项目(51971148)。
关键词
碳纳米管
表面改性
铝基复合材料
力学性能
carbon nanotubes
surface modification
aluminum-based composite
Mechanical properties
