Bulk sound velocity of porous materials at high pressures

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: porous materials high pressure sound velocity shock wave
• 年，卷（期）: 2002,（11）
• 页码范围: 1188-1192
• 页数: 5页
• 分类号: O4
• 语种: 英文

摘要

A correction of Walsh's method for bulk sound velocity calculation for shocked porous materials is accomplishedbased on the Wu-Jing thermodynamic equation of state. The corrected bulk velocities for solid and porous sampleswith low porosities are in good agreement with the corresponding experimental data published previously. On the basisof this corrected equation, the influence of thermoelectrons on the bulk velocity of shocked materials is discussed indetail at pressures of 50, 70 and 200 GPa. Some interesting phenomena are revealed, which seem to be the uniquefeatures of a dynamic-pressure-loading process and could not be found in static experiments.