Femtosecond X-ray Radiography of Shocked Diamond
ORAL
Abstract
Understanding how materials deform at the highest strain rate of shock compression is necessary to accurately model and predict the behavior of materials under extreme conditions. Using the femtosecond-duration pulses generated by the SACLA x-ray free electron laser (XFEL), we performed in-situ x-ray radiography of single crystal diamonds shocked along three different crystal orientations of <100>, <110>, and <111>. By illuminating the sample perpendicular to the shock propagation direction, we visualized elastic and inelastic shock wavefronts propagating in the diamond at different velocities, followed by subsequent deformation bands appearing along the {111} planes. Based on comparison to the known {111} slip and possible phase transition in diamond, we interpret these results indicate the formation of stacking faults initiating the inelastic deformation.
*This work was supported by grants from MEXT Quantum Leap Flagship Program (MEXT Q-LEAP) Grant No. JPMXS0118067246, Japan Society for the Promotion of Science (JSPS) KAKENHI (Grants Nos. 21J10604 and 20H00139), JSPS Core-to-Core Program B: Asia-Africa Science Platforms (Grant No. JPJSCCB20190003), Genesis Research Institute, Inc. (Konpon-ken, Toyota), Yamada Science Foundation, and the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
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Presenters
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Kento Katagiri
- Stanford University