Understanding large plastic deformation of SiC nanowires at room temperature
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Tensile behaviors of SiC  nanowires with various possible microstructures have been investigated by molecular-dynamics simulations. The results show that the large plastic deformation in these nanowires is induced by the anti-parallel sliding of 3C grains along an ultra-thin intergranular amorphous film parallel to the plane and inclined at an angle of 19.47° with respect to the nanowire axis. The resulting large plastic deformation of SiC nanowires at room temperature is attributed to the stretching, breaking and re-forming of Si–C bonds in the intergranular amorphous film, which is also evident from the sawtooth jumps in the stress-strain response.
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