Anisotropic Hugoniot elastic limit of MgO

18th APS-SCCM; 24th AIRAPT

Liu, X.^1 ; Ogata, K.^1 ; Zhou, X.M.^2 ; Nellis, W.J.^3 ; Sekine, T.^4 ; Mashimo, T.^1

Institute of Pulsed Power Science, Kumamoto University, Kurokami, Kumamoto

860-8555, Japan^1

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Mianyang

621900, China^2

Department of Physics, Harvard University, Cambridge

MA

02138, United States^3

Department of Earth and Planetary Systems Science, Hiroshima University, Higashi, Hiroshima

739-8526, Japan^4

关键词: Hugoniot elastic limit;    MgO crystals;    MgO single crystals;    Particle velocity profile;    Slip system;    Step structure;    Velocity interferometer system for any reflectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/6/062004/pdf
DOI  :  10.1088/1742-6596/500/6/062004

来源: IOP

【 摘 要 】

The particle velocity profiles of an MgO single crystal were measured along bothanddirections using a LiF window and a VISAR (velocity interferometer system for any reflector) combined with a powder gun. The Hugoniot elastic limit (HEL) of MgO in thedirection was ∼4.09-4.31 GPa and the particle velocity profiles indicated that MgO suffers stress relaxation with time. Along thedirection, the HEL was higher (∼13.6-14.9 GPa) than along thedirection and Anomalous, two-step-structure elastic waves were observed. These characteristics are discussed based on the slip system of the MgO crystal.