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Optimizing the interface bonding in Cu matrix composites by using functionalized carbon nanotubes and cold rolling

机译：通过使用官能化碳纳米管和冷轧优化Cu基质复合材料中的界面键合

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摘要

Nonuniform dispersion and weak interfacial bonding between carbon nanotubes ( CNTs) and Cu matrix are two critical issues for achieving high strength and good ductility of CNT/ Cu composites. Here, acid- treated CNTs precoated with Ni coatings were used to enhance the dispersion uniformity of CNTs and interfacial bonding between CNTs and Cu matrix in the CNT/ Cu composites fabricated through spark plasma sintering and subsequently cold rolling. Scanning electron microscopy analysis revealed the homogeneous dispersion of Nicoated CNTs ( Ni- CNTs) in the composite compared with uncoated CNTs. Transmission electron microscope observation indicated that Cu2O nanoparticles were in situ formed at the interface in Ni- CNT/ Cu composite, where CNTs were uncovered by Ni coatings. After rolling, the distribution of Ni- CNTs transformed into ribbons aligning along the rolling direction. The ultimate tensile strength ( UTS) of 261 MPa was achieved in rolled 1 vol% Ni- CNT/ Cu composite, which was 24.3% higher than that before rolling. The UTS of 2 vol% Ni- CNT/ Cu composite obviously decreased, which could be attributed to the agglomeration of Ni- CNTs in the Cu matrix due to the increased volume content.
机译：碳纳米管（CNT）和Cu基质之间的非均匀分散和弱界面键合是实现CNT / Cu复合材料的高强度和良好延性的两个关键问题。这里，使用Ni涂层精确酸的酸处理的CNT来增强CNT / Cu基质在通过火花等离子体烧结制造的CNT / Cu复合材料中的CNT和Cu基质之间的分散均匀性，随后冷轧。扫描电子显微镜分析显示，与未涂覆的CNT相比，在复合材料中均可化CNTS（Ni-CNT）的均匀分散。透射电子显微镜观察表明Cu2O纳米颗粒在Ni-Cnt / Cu复合材料中的界面处形成原位，其中Ni涂层未覆盖CNT。在轧制之后，将NI-CNT的分布转换成沿轧制方向对准的带。在轧制的1Vol％Ni-CNT / Cu复合材料中实现了261MPa的最终拉伸强度（UTS），其比轧制前的24.3％高24.3％。 2Vol％Ni-CNT / Cu复合材料的UTS明显降低，其由于体积含量增加而可能归因于Cu基质中的Ni-CNT中的凝聚。

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  • 来源
    《Journal of Materials Research》 |2019年第15期|2600-2608|共9页
  • 作者

    Liu Guijun; Tao Jingmei; Li Fengxian; Bao Rui; Liu Yichun; Li Caiju; Yi Jianhong;

  • 作者单位

    Kunming Univ Sci & Technol Fac Mat Sci & Engn Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci & Technol Fac Mat Sci & Engn Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci & Technol Fac Mat Sci & Engn Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci & Technol Fac Mat Sci & Engn Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci & Technol Fac Mat Sci & Engn Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci & Technol Fac Mat Sci & Engn Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci & Technol Fac Mat Sci & Engn Kunming 650093 Yunnan Peoples R China;

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

    Cu matrix composites; carbon nanotubes; interface; mechanical properties;

    机译：Cu矩阵复合材料;碳纳米管;界面;机械性能;

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