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Direct Observation of Super‐Plasticity of Beta‐SiC Nanowires at Low Temperature
Author(s) -
Zhang Y.,
Han X.,
Zheng K.,
Zhang Z.,
Zhang X.,
Fu J.,
Ji Y.,
Hao Y.,
Guo X.,
Wang Z. L.
Publication year - 2007
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200700162
Subject(s) - materials science , nanowire , plasticity , elongation , slip (aerodynamics) , scanning electron microscope , ultimate tensile strength , composite material , deformation (meteorology) , nanotechnology , physics , thermodynamics
Super‐plasticity of single‐crystal beta‐SiC [111] nanowires for > 200 % elongation was observed by in situ axial‐tensile experiments in a scanning electron microscope. The SiC nanowires were characterized by a bamboo‐like structure appearing as the 3C structured segments intergrowth along the nanowire. The axial localized plasticity and super‐plasticity are suggested to result only from the 3C segments, through dislocation generation, propagation and amorphization in contrast to the highly defected structural segments that conduct elastic‐deformation only, owing to the lack of slip systems. These results provide key information for understanding the mechanical behavior of SiC nanowires.