Shock Compression of Porous Aluminum and Nickel at Megabar Pressures

Data are given on shock compression of porous samples of aluminum with the initial density ₀₀= 0.34 g/cm³and nickel with ₀= 0.44 and 0.32 g/cm³. In the case of aluminum, all results are obtained for the first time ever. The range of pressure being investigated is from 0.25 to 76 GPa. For nickel, a shock adiabat is found with the porosity m= ₀/₀₀= 28 (which is the highest porosity for metals) and an adiabat with m= 20 at a pressure of 92 GPa, which is approximately twice the respective values obtained previously. Comparison is made with the results of other researchers.