Shock compression and release of polycrystalline magnesium oxide
Release wave profile and Hugoniot equation of state data for low‐porosity polycrystalline MgO are reported to 36 and 133 GPa, respectively. At low pressure, the Hugoniot lies above single‐crystal data, reflecting material strength of 3.1±0.8 GPa. Unloading wave velocities to 27 GPa are consistent with extrapolated compressional sound velocities. The unloading profiles can be fit using a viscoplastic model, but there are significant differences between waveforms for different experimental geometries.
© 1994 American Institute of Physics. Published online 10 July 1994. We thank M. Long, A. Devora, and E. Gelle for experimental assistance and L. S. Durango for editorial assistance. We are grateful to Dr. S. Rigden (ANU) for the ultrasonic sound velocity measurements. This research was supported by the NSF. Division of Geological and Planetary Sciences, California Institute of Technology contribution 5291.
Published - 1.46299.pdf