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Interface Structures of the Functional Bonded Materials Using Nanocrystalline Carbon 60

使用纳米晶碳 60 的功能性粘合材料的界面结构

基本信息

批准号：
05452291
负责人：
ISHIDA Yoichi
金额：
$ 3.07万
依托单位：
UNIVERSITY OF TOKYO
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452291/
关键词：
Nanocrystalline Carbon60 Composite Interface Electron microscope Carbon nanotubes C_<60>接合

项目摘要

Atomic structures of grain boundaries in nanocrystalline carbon 60, and defect structuers in heavily deformed carbon nanotube as well as nanotube fiber reinforced nanocrystalline carbon 60 were examined by high resolution electron microscopy and their influence on the mechanical properties were investigated as part of our efforts to develop the new carbons as engineering materials. The carbon 60 is unique in the mechanical property due to highly symmetrical crystal structure. Face centered cubic structure with many slip planes allow the crystal to deform by a large amount. A stereographic analysis of the slip traces showed that the active system at room temperature is {lll} <110>. In order to increase the ductility of carbon 60, the nanocrystalline aggregate was produced by vaporization in Helium at 10 Torr. The results of the tensile tests of thin sheet specimen at room temperature, the nanocrystalline specimen was most ductile and the work hardening rate comparable or below that of s … More ingle crystalline C60. The result suggested that superplastic behavior of fine crystalline aggregate operates even at room temperature in C60.On the other hand, carbon nanotube, discovered by Iijima is cylindrical high order fullerene which grows in the debris on the anode as a biproduct during production of C60. It is a kind of whisker, so taht an extremely high tensile strength and zero plasticity is generally anticipated. However, our experiment proved the defomation of nanotubes. Curved nanotubes were observed, while no example of fracture was obrained. High resolution electron microscopy showed that the deformation is buckling of inner compressive side of the nanotube.The engineering of the carbon nanotube can proceed because the material has been proved ductile. The use of nanotube as the fiber to strengthen C60 or soft metals has been suggested. The carbon nanotube/C60 system can be produced simply by extrusion instead. The composite where the alignment of nanotube is achieved by the extrusion of the composite in a silver sheath. High resolution electron micrograph showed that the carbon nanotubes are defect free in the as extruded composite. The matrix C60, however, was nanocrystalline suggesting a good ductility at room temperature. Less

本文采用高分辨电子显微镜研究了纳米碳60的晶界原子结构、大变形碳纳米管和纳米管纤维增强纳米碳60中的缺陷结构及其对力学性能的影响。由于高度对称的晶体结构，碳60在机械性能方面是独特的。具有许多滑移面的面心立方结构允许晶体大量变形。对滑移痕迹的赤平极射分析表明，室温下的活性体系为{lll}<110>。为了增加碳60的延展性，通过在10托的氦气中蒸发来产生纳米晶聚集体。薄板试样室温拉伸试验结果表明，纳米晶试样的塑性最好，加工硬化率与纳米晶试样相当或低于纳米晶试样 ...更多信息单晶C60。结果表明，C60在室温下也表现出超塑性行为。另一方面，Iijima发现的碳纳米管是在C60制备过程中以副产物形式生长在阳极碎屑中的柱状高阶富勒烯。它是一种晶须，因此通常预计具有极高的抗拉强度和零塑性。然而，我们的实验证明了纳米管的变形。观察到弯曲的纳米管，而没有观察到断裂的例子。高分辨电子显微镜观察表明，碳纳米管的变形是内压侧的屈曲，由于碳纳米管具有良好的韧性，因此可以进行工程化。已经建议使用纳米管作为纤维来增强C60或软金属。碳纳米管/C60系统可以简单地通过挤出来生产。通过在银鞘中挤出复合物来实现纳米管的排列的复合物。高分辨电子显微镜显示，在挤压复合材料中的碳纳米管是无缺陷的。然而，基体C60是纳米晶，这表明在室温下具有良好的延展性。少