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采用羰基热分解法对多壁碳纳米管表面进行镀钨处理,并以镀钨碳纳米管和电解铜粉为原料,进行机械球磨混粉和放电等离子体烧结,制备了镀钨碳纳米管/铜基复合材料.采用场发射扫描电镜观察了粉体和复合材料的组织形貌,并对复合材料物相进行了X射线衍射分析.探讨了镀钨碳纳米管含量和放电等离子体烧结温度对复合材料致密度、抗拉强度、延伸率和电导率的影响.结果表明,镀钨碳纳米管质量分数为1%和烧结温度为850℃时,复合材料的致密度、抗拉强度和电导率最高.与烧结纯铜相比,复合材料的抗拉强度提高了103.6%,电导率仅降低15.9%.
The surface of the multi-walled carbon nanotubes was treated with tungsten carbide by the method of carbonyl pyrolysis, and the tungsten carbide nanotubes and the electrolytic copper powder were used as the raw materials for mechanical milling and discharge plasma sintering. Cu-based composites.The morphology of the powders and composites were observed by field emission scanning electron microscopy and X-ray diffraction analysis of the composite phase was carried out.The effects of the content of tungsten-coated carbon nanotubes and the sintering temperature of the discharge plasma The density, tensile strength, elongation and electrical conductivity of the composites were investigated.The results showed that the density, tensile strength and electrical conductivity of the composites were both 1% and 850 ℃ The tensile strength of composites increased by 103.6% and the conductivity decreased by only 15.9% compared with sintered pure copper.