Ion Beam Modification of Carbon Nanotube Yarn in Air and Vacuum

被引:11
作者
Gigax, Jonathan G. [1 ]
Bradford, Philip D. [2 ]
Shao, Lin [1 ]
机构
[1] Texas A&M Univ, Dept Nucl Engn, College Stn, TX 77843 USA
[2] North Carolina State Univ, Dept Text Engn Chem & Sci, Raleigh, NC 27695 USA
基金
美国国家科学基金会;
关键词
ion-solid interaction; carbon nanotubes; ion beam welding; carbon nanotube yarn;
D O I
10.3390/ma10080860
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We studied the effects ion beam irradiation on carbon nanotube (CNT) yarns. CNT yarn was fabricated by drawing and spinning CNT sheets from a vertically aligned CNT forest. The yarn was irradiated by 2.5 MeV protons in either vacuum or air. Irradiation in air was achieved by directing the proton beam through a 0.025 mm thick Ti window. Irradiation in vacuum occurred at a pressure of < 10(-6) torr at room temperature and at an elevated temperature of 600 degrees C. Tensile testing revealed that CNT yarn irradiated in air increased in tensile strength with increasing proton fluence. For yarn irradiated in vacuum, however, the strength decreased with increasing fluence. We believe that irradiation-induced excitation and trapping/bonding of gas atoms between tubes may play a role for the mechanical property changes.
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页数:7
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