Shock compressibility of high-porosity copper and tin powders

The particle and wave velocities in copper and tin samples with an extremely high porosity are measured by a magnetoelectric method. Relations between the wave and particle velocities are obtained for copper with a density of 0.76 and 0.54 g/cm$^3$ (porosity factor of 12 and 16, respectively) and for tin with a density of 1.9 g/cm$^3$ (porosity factor of 3.9). The obtained data are used to find other hydrodynamic parameters of a compressed substance (density, pressure, specific internal energy) using the laws of conservation. The parameters of the state of copper and tin are found in the region of the P–V–T states of the metals that has not been studied earlier and corresponds to low densities and high internal energies.