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Radiation-induced mechanical property changes of CNT yarn.
- Source :
-
Nuclear Instruments & Methods in Physics Research Section B . Oct2017, Vol. 409, p268-271. 4p. - Publication Year :
- 2017
-
Abstract
- Stimulated by the previous findings that ion beam can induce carbon nanotube (CNT) welding, we studied the irradiation effects on CNT yarns by proton irradiation. A 2.5 MeV proton beam was transmitted through a 25 μm thick Ti window and irradiated CNT yarn in air. The yarn, of about 40 μm in diameter, was fabricated by pulling and spinning CNT bundles from a CNT aligned film. After irradiation to an ion fluence of 5 × 10 12 , 1 × 10 13 , 1 × 10 14 , and 1 × 10 15 cm −2 , Raman spectroscopy was performed to study defect behavior by comparing intensity changes to the D and G bands at 1350 cm − 1 and 1560 cm − 1 , respectively. The analysis revealed a decreasing defect level up to 1 × 10 13 cm −2 , followed by an increasing defect level with increasing fluence. The mechanical properties of the yarns are characterized by using a tensile tester with a strain rate of 0.2 mm/min at room temperature. The maximum tensile strength occurred at a fluence of 1 × 10 13 cm −2 . With increasing proton fluencies, the fracture strain shows gradual enhancement. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RADIATION
*CARBON nanotubes
*PROTON beams
*RAMAN spectroscopy
*TENSILE strength
Subjects
Details
- Language :
- English
- ISSN :
- 0168583X
- Volume :
- 409
- Database :
- Academic Search Index
- Journal :
- Nuclear Instruments & Methods in Physics Research Section B
- Publication Type :
- Academic Journal
- Accession number :
- 125311949
- Full Text :
- https://doi.org/10.1016/j.nimb.2017.04.050