Influence of nanoscale parameters on solid-solid phase transformation in Octogen crystal: multiple solution and temperature effect1)
A. M. Roy2)
University of Michigan, Materials Science and Engineering, Ann Arbor, MI 48109, USA
Abstract
In this study, the influence of two nanoscale parameters (e.g., ratios of
energy and width of two different interfaces) and temperature have been
investigated which drastically affects the formation of interfacial melt during
solid-solid phase transformations in energetic Octogen crystal.
For different critical values of these parameters and depending on the energy
barrier of the solid-melt interface, the appearance of propagating interfacial
melt can be either continuous-reversible without the hysteresis or jump-like
first-order discontinuous transformation with hysteresis. It is found that these
nanoscale parameters significantly affect the phase transformation mechanism,
induces different scale effects, and changes the nanoscale behavior of octogen
crystal.