Abstract
The formation and stability of a nanosized propagating intermediate melt (IM) have been analyzed more than below the melting temperature between the solid-solid (SS) phase boundary during phase transformation (PT) in a HMX nanocrystal. The influence of the solid-melt barrier K 12 and two important nanoscale material parameters (ratios of SS and solid-melt SM interface energies, k E and width, ) on the barrierless nucleation and appearance of non-equilibrium IM has been studied. Numerical results reveal that the solution of IM can either be continuous reversible or jump-like first-order discontinuous transformation with hysteresis. Additionally, various parametric studies on the structure, energy, width, and mobility of IM have been explored to understand the mystifying PT behaviors of HMX.
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