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High pressure phase transformation in iron under fast compression
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View: Figures


Image of FIG. 1.
FIG. 1.

Measured boundary velocity history, for several initial sample temperatures; sliding time scale. Inset: Sketch of the experimental geometry including the Al anode, Fe sample, window, and the heater block. is the measured driving pressure at the Al/Fe boundary.

Image of FIG. 2.
FIG. 2.

Experimental data, equilibrium hydrodynamic simulations, and kinetics model in black solid, black dotted, and red dashed lines, respectively; is defined as the onset of the phase transformation in the equilibrium hydrodynamic simulations. Inset: Parametric plot of the pressure vs density for Fe according to equilibrium simulations—black solid, and kinetics model—red dashed.

Image of FIG. 3.
FIG. 3.

Phase diagram of Fe and phase space trajectories (dashed lines) explored in the experiments. The onset and completion of the transition according to the kinetics model are marked by red circles and triangles, respectively.

Image of FIG. 4.
FIG. 4.

Projected sample response at various driving conditions as defined by the characteristic drive time . Symbols labeling solid curves identify , as shown in the inset. Dashed curve corresponds to the same drive as the solid one labeled by the triangle but with a higher concentration of initial nucleating “defects.” The inset plots the phase transformation completion time as a function of the characteristic drive time .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High pressure phase transformation in iron under fast compression