We report on a series of experiments that use high power lasers to ramp compress aluminum al up to 475 gpa. The solid solid al phase transformations fcc hcp and hcp bcc are observed at 216 9 gpa and 321 12 gpa respectively with the bcc phase persisting to 475 gpa.
Color Online Representative Experimental Visar Data Black
Measurement of body centered cubic aluminum at 475 gpa. Ticks for re are not plotted for the spectra collected at 231 and 301 gpa. In situ x ray diffraction is performed to detect the crystal structure. We report on a series of experiments that use high power lasers to ramp compress aluminum al up to 475 gpa. 119 175702 2017 article in physical review letters 1202 january 2018 with 60 reads how we measure reads. 2017 oct 2711917 175702. A velocimetry diagnostic measures particle velocities in order to infer the pressure in.
Under this quasi isentropic compression al remains in the solid state and two solidsolid phase transformations are observed. We report on a series of experiments that use high power lasers to ramp compress aluminum al up to 475 gpa. This corrects measurement of body centered cubic aluminum at 475 gpa phys rev lett. Measurement of body centered cubic aluminum at 475 gpa. Under this quasi isentropic compression al remains in the solid state and two. B volume of aluminum measured in run 4.
The solid solid al phase transformations fcchcp and hcpbcc are observed at 2169 and 32112 gpa respectively with the bcc phase persisting to 475 gpa. In situ x ray diffraction is performed to detect the crystal structure. The original body centered cubic bcc phase transfers to an orthorhombic phase at 106 gpa during compression at room temperature and the orthorhombic phase remains stable up to 40 gpa. When the lattice stress is released entirely the orthorhombic phase can further transform into a body centered tetragonal structure. Under this quasi isentropic compression al remains in the solid state and two solid solid phase transformations are observed. Measurement of body centered cubic aluminum at 475 gpa.
Measurement of body centered cubic aluminum at 475 gpa phys. Nanosecond in situ x ray diffraction and simultaneous velocimetry measurements were used to determine the crystal structure and pressure respectively of ramp compressed aluminum at stress states between 111 and 475 gpa. Nanosecond in situ x ray diffraction and simultaneous velocimetry measurements were used to determine.
Gallery of Measurement Of Body Centered Cubic Aluminum At 475 Gpa
