Figure from the DOE Report April, 2016

April 2016 DOE Report

Observation of Solid–Solid Phase Transitions in Ramp-Compressed Aluminum

The crystalline structure of solid aluminum compressed up to 5 Mbar was measured using x-ray diffraction (XRD). These compression experiments traverse the region of phase space along the aluminum isentrope between 1 to 5 Mbar where the fcc–hcp (face–centered cubic–hexagonal close-packed) and hcp–bcc (hexagonal close-packed–body-centered-cubic) solid–solid phase transitions are predicted by density functional theory calculations.

Shown here: X-ray diffraction (XRD) image-plate data projected into 2θφ space for a shot at ~2.6 Mbar.

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