2020 年 30 巻 3 号 p. 216-224
Laser-driven dynamic compression is used to study matters under extreme pressure and temperature conditions of dynamical pressure and temperature conditions, moreover, the application of this technique to material science researches has been accelerated. A high-strain rate over 10－8 s－1 is a unique and critical feature of the compression in the material science applications. X-ray free electron laser (XFEL) is a vital tool to directly observe the structure under such ultrafast, high-strain rate compression. Here we present the latest observations taking advantage of the ultrafast compression at the XFEL platform; 1) ultrafast uniaxial compression of highly oriented pyrolytic graphite, 2) nano-crystallization of crystalline ceramics under ultrafast deformation.
