【摘要】 将用氢电弧法制备的单壁纳米碳管（SWNTs）提纯后与纳米Al粉体混合,在室温下冷压成型,再在260～480℃真空热压处理,制备出相对密度大于90％、SWNTs弥散分布于纳米A1基体中的单壁纳米碳管增强纳米铝复合材料.含量为2.5％（质量分数）的SWNTs对纳米A1基体的增强效果约为55％.SWNTs/纳米A1复合材料的硬度随热压温度的升高而增加,热压温度为380℃时硬度达到峰值2.21GPa,大约是粗晶A1的15倍,比同样温度热压出的纳米A1块体的硬度高36.4％.更多还原

【Abstract】 Single-walled carbon nanotubes (SWNTs) and nanocrystalline Al (nano-AI) particles were prepared by hydrogen arc discharge method and active H2 plasma evaporation method, respectively. Then, 2.5 % of purified SWNTs were stirred ultrasonically into the nano-AI particles homogeneously. The obtained mixture was compacted into disk under a pressure of 1.5 GPa at room temperature. Then the disks were consolidated for 30 min under a pressure of 1.0 GPa at temperatures ranging from 260 to 480℃ in vacuum. The study showed that SWNTs were prefect reinforcement, and 2.5% pct of which in SWNTs/nano-AI composites led to a 55% increase of hardness compared with that of nano-AI. The hardness of the fabricated SWNTs/nano-AI composites increased with the rise of consolidating temperature, and reached the peak value of 2.21 GPa at 380℃, which was about 15 times as that of coarse-grained Al and 36.4% more than that of the nano-AI consolidated at the same temperature.更多还原