Anisotropic Hugoniot elastic limit of MgO

[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.

[发布机构] 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