Phononic characteristics to determine absorbing shock-wave energy for low-dimensional materials

KX Lin and YK Tan and HM Chen and XM Tao and YF Ouyang and Y Du, CARBON, 203, 410-415 (2023).

DOI: 10.1016/j.carbon.2022.12.006

Recent, the low-dimensional materials open an exciting research opportunity for material properties that related to phonon dynamics in specific applications. We have performed the molecular dynamics of the shock-wave propagation in nanocomposites consisting of different low- dimensional carbon materials (FCC-C60, MCNT, or MGNS) and monocrystal Al. The results have revealed the intrinsic correlation between their phononic characteristics and shock-wave energy absorption. Herein, the MCNT far outperforms the other structures in elastic absorption for shock-wave energy to reduce 80% of the shock-wave intensity. As expected, dispersion mechanism is mediated by the interaction between mid-frequency phonons and shock-wave, absorbing large amounts of shock- wave energy. In addition, dissipation mechanism constitutes an auxiliary driver of energy absorption. The process is shown to stem from synergistic effect of thermal phonon scattering in crystal and interfacial phonon damping. Our work provides a potential approach for creating extreme energy absorption in nanocomposites.

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