极限抗拉强度
复合材料
材料科学
碳纳米管
透射电子显微镜
扫描电子显微镜
丝带
纳米管
拉伸试验
碳纳米管的力学性能
模数
图层(电子)
纳米技术
作者
Min-Feng Yu,O. Lourie,Mark J. Dyer,Katerina Moloni,Thomas F. Kelly,Rodney S. Ruoff
出处
期刊:Science
[American Association for the Advancement of Science]
日期:2000-01-28
卷期号:287 (5453): 637-640
被引量:5158
标识
DOI:10.1126/science.287.5453.637
摘要
The tensile strengths of individual multiwalled carbon nanotubes (MWCNTs) were measured with a "nanostressing stage" located within a scanning electron microscope. The tensile-loading experiment was prepared and observed entirely within the microscope and was recorded on video. The MWCNTs broke in the outermost layer ("sword-in-sheath" failure), and the tensile strength of this layer ranged from 11 to 63 gigapascals for the set of 19 MWCNTs that were loaded. Analysis of the stress-strain curves for individual MWCNTs indicated that the Young's modulus E of the outermost layer varied from 270 to 950 gigapascals. Transmission electron microscopic examination of the broken nanotube fragments revealed a variety of structures, such as a nanotube ribbon, a wave pattern, and partial radial collapse.
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