title: Enhanced ductile behavior of tensile-elongated individual double-walled and triple-walled carbon nanotubes at high temperatures.
abstract: We report exceptional ductile behavior in individual double-walled and triple-walled carbon nanotubes at temperatures above 2000 degrees C, with tensile elongation of 190% and diameter reduction of 90%, during in situ tensile-loading experiments conducted inside a high-resolution transmission electron microscope. Concurrent atomic-scale microstructure observations reveal that the superelongation is attributed to a high temperature creep deformation mechanism mediated by atom or vacancy diffusion, dislocation climb, and kink motion at high temperatures. The superelongation in double-walled and triple-walled carbon nanotubes, the creep deformation mechanism, and dislocation climb in carbon nanotubes are reported here for the first time.
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA. jhuang@sandia.gov
authors.forename: J Y
authors.initials: JY
authors.lastname: Huang
authors.forename: S
authors.initials: S
authors.lastname: Chen
authors.forename: Z F
authors.initials: ZF
authors.lastname: Ren
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: K
authors.initials: K
authors.lastname: Kempa
authors.forename: M J
authors.initials: MJ
authors.lastname: Naughton
authors.forename: G
authors.initials: G
authors.lastname: Chen
authors.forename: M S
authors.initials: MS
authors.lastname: Dresselhaus