A constant tension and constant temperature molecular dynamics simulation method was used in the calculations of the elastic constants of the nanocomposite systems. The nanocomposite systems contain a core of sp3 diamond structure surrounded by an amorphous carbon network. The simulation results show that the elastic properties of nanocomposites of diamond-like carbons are closely related to the size of the sp3 diamond core; the bigger the core, the larger the elastic constants, and the system becomes more anisotropic.

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