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23-Jan-2006

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Superplastic Carbon Nanotubes, Nature
 









Excerpts: Conditions have been discovered that allow extensive deformation of
rigid single-walled nanotubes.  The theoretical maximum tensile strain ¡X that
is, elongation ¡X of a single-walled carbon nanotube is almost 20%1, 2, but in
practice only 6%3, 4 is achieved. Here we show that, at high temperatures,
individual single-walled carbon nanotubes can undergo superplastic deformation,
becoming nearly 280% longer and 15 times narrower before breaking. This
superplastic deformation is the result of the nucleation and motion of kinks in
the structure, and could prove useful in helping to strengthen and toughen
ceramics and other nanocomposites at high temperatures.
Source: Superplastic Carbon Nanotubes[
http://www.nature.com/nature/journal/v439/n7074/full/439281a.html ], J. Y.
Huang, S. Chen, Z. Q. Wang, K. Kempa, Y. M. Wang, S. H. Jo, G. Chen, M. S.
Dresselhaus, Z. F. Ren, DOI: 10.1038/439281a, Nature 439, 281, 06/01/19

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