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Kinetics of propagating phase transformation in compressed bismuth

Marina Bastea, Sorin Bastea, James A. Emig, Paul T. Springer, David B. Reisman

cond-mat.mtrl-sciarXiv:cond-mat/0408440

Abstract

We observed dynamically driven phase transitions in isentropically compressed bismuth. By changing the stress loading conditions we explored two distinct cases: one in which the experimental signature of the phase transformation corresponds to phase-boundary crossings initiated at both sample interfaces, and another in which the experimental trace is due to a single advancing transformation front in the bulk of the material. We introduce a coupled kinetics - hydrodynamics model that for this second case enables us, under suitable simplifying assumptions, to directly extract characteristic transition times from the experimental measurements.

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