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Improved dispersion of carbon nanotubes in aluminum nanocomposites

机译：碳纳米管在铝纳米复合材料中的分散性得到改善

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摘要

In this study, we investigated the influence of the dispersion technique of carbon nanotubes (CNT) in the production of aluminum matrix nanocomposites. Three production routes using different dispersion techniques were tested: in Rl route the CNT were dispersed using an ultrasonic bath; in R2 route the dispersion was achieved by ultrasonication, while in R3 route the dispersion and mixing were performed by ultrasonication CNT and Al powders. Nanocomposites with several CNT contents (0.25-2.0 wt.%) were produced by conventional powder metallurgy procedures. Microstructural characterization by scanning and transmission electron microscopies revealed that the best dispersion of the CNT is obtained using R3 route. Nanocomposites with 0.75 wt.% of CNT exhibit well dispersed and embedded nanotubes and the highest hardness and tensile strength. The observed 200% increase in the tensile strength attested the strengthening effect of the CNT and the efficiency of the new dispersion treatment (R3 route).
机译：在这项研究中，我们调查了碳纳米管（CNT）的分散技术对铝基纳米复合材料生产的影响。测试了使用不同分散技术的三种生产路线：在R1路线中，使用超声波浴将CNT分散；在R2途径中，分散是通过超声处理实现的，而在R3途径中，分散和混合是通过超声处理CNT和Al粉进行的。通过常规粉末冶金方法生产具有几种CNT含量（0.25-2.0重量％）的纳米复合材料。通过扫描和透射电子显微镜的显微结构表征表明，使用R3途径获得了CNT的最佳分散。具有0.75 wt。％的CNT的纳米复合材料表现出良好的分散和嵌入纳米管，并且具有最高的硬度和拉伸强度。观察到的拉伸强度增加200％，证明了CNT的增强效果和新分散处理（R3路线）的效率。

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  • 来源
    《Composite Structures》 |2014年第2期|992-1000|共9页
  • 作者

    Sonia Simoes; Filomena Viana; Marcos A.L. Reis; Manuel F. Vieira;

  • 作者单位

    CEMUC, Department of Metallurgical and Materials Engineering, University of Porto, R. Dr. Roberto Frias, 4200-465 Porto, Portugal;

    CEMUC, Department of Metallurgical and Materials Engineering, University of Porto, R. Dr. Roberto Frias, 4200-465 Porto, Portugal;

    Faculdade de Ciencias Exatas e Tecnologia, Universidade Federal do Para, Abaetetuba, PA 68440-000, Brazil;

    CEMUC, Department of Metallurgical and Materials Engineering, University of Porto, R. Dr. Roberto Frias, 4200-465 Porto, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    EBSD; Electron microscopy; Hardness measurement; Powder metallurgy; Nanocomposites;

    机译：EBSD;电子显微镜;硬度测量;粉末冶金;纳米复合材料;

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