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Metals 2016, 6(1), 17;

Structural Dynamics of Materials under Shock Compression Investigated with Synchrotron Radiation

Photon Factory, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-8555, Japan
Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan
Author to whom correspondence should be addressed.
Academic Editor: Klaus-Dieter Liss
Received: 30 September 2015 / Revised: 4 December 2015 / Accepted: 9 December 2015 / Published: 15 January 2016
(This article belongs to the Special Issue Metals Challenged by Neutron and Synchrotron Radiation)
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Characterizing material dynamics in non-equilibrium states is a current challenge in material and physical sciences. Combining laser and X-ray pulse sources enables the material dynamics in non-equilibrium conditions to be directly monitored. In this article, we review our nanosecond time-resolved X-ray diffraction studies with 100-ps X-ray pulses from synchrotron radiation concerning the dynamics of structural phase transitions in non-equilibrium high-pressure conditions induced by laser shock compression. The time evolution of structural deformation of single crystals, polycrystals, and glass materials was investigated. In a single crystal of cadmium sulfide, the expected phase transition was not induced within 10 ns at a peak pressure of 3.92 GPa, and an over-compressed structure was formed. In a polycrystalline sample of Y2O3 stabilized tetragonal zirconia, reversible phase transitions between tetragonal and monoclinic phases occur within 20 ns under laser-induced compression and release processes at a peak pressure of 9.8 GPa. In polycrystalline bismuth, a sudden transition from Bi-I to Bi-V phase occurs within approximately 5 ns at 11 GPa, and sequential V–III–II–I phase transitions occur within 30 ns during the pressure release process. In fused silica shocked at 3.5 GPa, an intermediate-range structural change in the nonlinear elastic region was observed. View Full-Text
Keywords: structural dynamics; shock compression; time-resolved X-ray diffraction; synchrotron radiation structural dynamics; shock compression; time-resolved X-ray diffraction; synchrotron radiation

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Ichiyanagi, K.; Nakamura, K.G. Structural Dynamics of Materials under Shock Compression Investigated with Synchrotron Radiation. Metals 2016, 6, 17.

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