Ding, Feng and Jiao, Kun and Wu, Mingqi and Yakobson, Boris I. (2007) Pseudoclimb and dislocation dynamics in superplastic nanotubes. PHYSICAL REVIEW LETTERS, 98 (7).
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Plastic relaxation of carbon nanotubes under tension and at high temperature is described in terms of dislocation theory and with atomistic computer simulations. It is shown how the glide of pentagon-heptagon defects and a particular type of their pseudoclimb, with the atoms directly breaking out of the lattice, work concurrently to maintain the tube perfection. Derived force diagram quantifies the balance between these mechanisms, while simulations show both helical and longitudinal movement of the kinks, in agreement with the forces and with experimental observations.
|Subjects:||Physical Science > Nano objects|
Material Science > Nanostructured materials
|Deposited By:||Anuj Seth|
|Deposited On:||26 May 2009 16:30|
|Last Modified:||26 May 2009 16:30|
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