Anomalous elastic-plastic transition of MgO under shock compression

作者：Liu, Xun; Mashimo, Tsutomu^*; Ogata, Kenichi; Kinoshita, Takahiro; Sekine, Toshimori; Zhou, Xianming; Nellis, Williams J.

来源：Journal of Applied Physics, 2013, 114(24): 243511.

DOI：10.1063/1.4854435

• EQUATION-OF-STATE
• MAGNESIUM-OXIDE
• WAVE
• PRESSURE
• GPA

The particle velocity profiles of an MgO single crystal under shock compression were measured up to a pressure of 35 GPa by a velocity interferometer system for any reflector using a LiF window combined with a powder gun. The Hugoniot-elastic limit (HEL) of MgO along the < 100 > direction was 2.9-4.3 GPa and the initial elastic waves contain some oscillations. Along the < 110 > direction, the HEL was higher than along the < 100 > direction and anomalous, two-step-structure elastic waves were observed. These characteristics are discussed based on the slip system of the MgO crystal.

• 出版日期2013-12-28
• 单位中国工程物理研究院流体物理研究所; 四川大学