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首页> 外文期刊>Materials Science and Engineering >Microstructure and mechanical properties of bulk carbon nanotubes compacted by spark plasma sintering
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Microstructure and mechanical properties of bulk carbon nanotubes compacted by spark plasma sintering

机译：火花等离子体烧结致密的块状碳纳米管的微观结构和力学性能

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摘要

Multi-walled carbon nanotube bulk materials were prepared by spark plasma sintering at 1700-2000 ℃. The effect of the sintering temperature on the microstructure and mechanical properties of the bulk materials were investigated. The results indicated that with increasing sintering temperatures, the density, electrical conductivity, bending strength and fracture toughness of the compacts all increase. However, when the sintering temperature exceeds 1900 ℃, the density slowly increases, resulting in a slow increase in bending strength. The multi-walled carbon nanotube bulk material sintered at 2000 ℃ exhibits the highest density of 1.56 × 10~3 Kg/m~3 with an electrical conductivity of 5.23 × 10~5 S/m, bending strength of 77.9 MPa and fracture toughness of 4.06 MPa m~(1/2). The formation of the graphene nanosheets is the main factor that greatly improves the electrical conductivity of the bulk materials. In addition, graphitization was observed and the surface of the bulk material became covered by the interlocked graphene layers when the surface was polished.
机译：在1700-2000℃下通过火花等离子体烧结制备了多壁碳纳米管本体材料。研究了烧结温度对块状材料微观结构和力学性能的影响。结果表明，随着烧结温度的升高，压坯的密度，电导率，弯曲强度和断裂韧性均增加。然而，当烧结温度超过1900℃时，密度缓慢增加，导致弯曲强度缓慢增加。在2000℃烧结的多壁碳纳米管散装料的最高密度为1.56×10〜3 Kg / m〜3，电导率为5.23×10〜5 S / m，弯曲强度为77.9 MPa，断裂韧度为。 4.06 MPa m〜（1/2）。石墨烯纳米片的形成是极大地改善块状材料的电导率的主要因素。另外，观察到石墨化，并且当抛光表面时，块状材料的表面被互锁的石墨烯层覆盖。

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  • 来源
    《Materials Science and Engineering》 |2013年第20期|12-17|共6页
  • 作者

    Zhao-Hui Zhang; Long Qi; Xiang-Bo Shen; Fu-Chi Wang; Shu-Kui Lee;

  • 作者单位

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China ,National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, PR China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China ,National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, PR China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China ,National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Multi-walled carbon nanotube; Spark plasma sintering; Graphene nanosheets; Graphitization; Mechanical properties;

    机译：多壁碳纳米管;火花等离子体烧结;石墨烯纳米片;石墨化机械性能;

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