CARBON NANOTUBE/METAL CARBIDE COMPOSITES WITH ENHANCED PROPERTIES
    5.
    发明申请
    CARBON NANOTUBE/METAL CARBIDE COMPOSITES WITH ENHANCED PROPERTIES 审中-公开
    具有增强性能的碳纳米管/金属碳化物复合材料

    公开(公告)号:US20120064341A1

    公开(公告)日:2012-03-15

    申请号:US13240071

    申请日:2011-09-22

    摘要: Composite structures of carbon nanotubes (CNTs) and metal carbides include a helical nanotube/carbide composite fiber, and a film. The composite fiber was prepared by pulling/twisting carbon nanotubes from an array of nanotubes to form an as-spun fiber and soaking it a metal precursor solution, and then heating it under a reducing atmosphere with a carbon source. The composite fiber had a higher tensile strength, a higher conductivity, and a higher tensile modulus than the as-spun fiber. A composite structure in the form of parallel ribbons of aligned carbon nanotubes embedded in a film of NbC showed an enhanced conductivity along the CNT axial direction, and improved superconducting properties. The enhanced upper critical field of NbC/CNT suggested that the inclusion of CNTs in the NbC matrix reduced the coherence length of the NbC. Nanomechanical testing also demonstrated the potential for enhanced fracture toughness of NbC/CNT composites.

    摘要翻译: 碳纳米管(CNT)和金属碳化物的复合结构包括螺旋状纳米管/碳化物复合纤维和膜。 通过从纳米管阵列拉伸/扭转碳纳米管以形成初纺纤维并将其浸入金属前体溶液中,然后在还原气氛下用碳源加热来制备复合纤维。 复合纤维的拉伸强度高,导电性高,拉伸模量高于初纺纤维。 嵌入NbC膜中的排列碳纳米管的平行带形式的复合结构显示出沿着CNT轴向方向的增强的导电性和改善的超导特性。 NbC / CNT增强的上临界场表明,纳米碳纳米管在NbC基体中的含量降低了NbC的相干长度。 纳米机械测试也证明了NbC / CNT复合材料的断裂韧性提高的潜力。