【摘要】 用正交试验法优化了纳米碳管增强铜基电接触材料的制备工艺,探讨了纳米碳管表面处理时间、原料球磨时间和纳米碳管含量对复合材料综合性能的影响。结果表明:最佳制备工艺参数为,表面处理时间1.0h,球磨时间8h,纳米碳管最佳质量分数为0.1%。在优化制备的纳米碳管增强铜基电接触材料中,纳米碳管分散均匀,其布氏硬度为78.3HBS 2.5/62.5/30,电阻率为2.08×10–6Ω·cm,抗熔焊及抗氧化性能均得到较大提高,能够满足电接触材料综合性能的要求。更多还原

【Abstract】 The preparation technology for copper-based electrical contact materials reinforced by carbon nanotube was optimized by orthogonal experiment, and the effects of surface treating time, ball-milling time, and mass fraction of carbon nanotube on the comprehensive properties of this composite were studied. The results show that the optimal technological parameters were that the surface treating time of carbon nanotube is 1.0 h, ball-milling time is 8 h, and the mass fraction of carbon nanotube is 0.1%. Carbon nanotubes are distributed uniformly in composite, enhancing the Brinell hardness of composite to 78.3 HBS 2.5/62.5/30. The properties of fusion welding resistance and oxidation resistance for composite are also improved, without obvious increase in resistivity. This composite can meet the demands of the required comprehensive properties for electrical contact materials.更多还原