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Using the first-principles method based on density functional theory, the effect of helium irradiation on Ti3SiC2 has been investigated. It was observed that helium atoms prefer to accumulate within the layers where Si atoms have been dislodged creating 2-dimensional channels and bubbles which strongly promotes cleavage fractures between adjacent Ti–Si layers. At high temperature the He atoms diffuse...
The fracture strengths and elastic moduli of arc-grown multi-walled carbon nanotubes (MWCNTs) were measured by tensile loading inside of a scanning electron microscope (SEM). Eighteen tensile tests were performed on 14 MWCNTs with three of them being tested multiple times (3×, 2×, and 2×, respectively). All the MWCNTs fractured in the “sword-in-sheath” mode. The diameters of the MWCNTs were measured...
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