The aim of this work is to determine the melting temperature of boron carbide at high shock pressures. To this end, powder boron carbide samples have been compressed by shock waves with an amplitude of 60–80 GPa. Shocked samples have been recovered for the subsequent electron microscopy, X-ray spectroscopy, and X-ray diffraction analyses. The event of sample melting has been identified by the disappearance of boundaries between particles of the recovered initially powder sample. The pressure and temperature of shocked particles of boron carbide powder have been calculated using a hydrocode based on the previously developed equations of state for boron carbide and experimental setup materials. The average melting temperature of the boron carbide has been determined as T_ml = 1900(500) K at the pressure P_ml = 70(10) GPa.

中文翻译：

---

碳化硼的熔化

这项工作的目的是确定高冲击压力下碳化硼的熔化温度。为此，粉末碳化硼样品已被振幅为60-80 GPa的冲击波压缩。已经回收了震惊的样品，用于随后的电子显微镜，X射线光谱学和X射线衍射分析。样品熔化的事件已通过回收的最初粉末样品的颗粒之间的边界消失而确定。基于先前开发的碳化硼状态方程和实验装置材料，已经使用水力编码计算了碳化硼粉末的冲击颗粒的压力和温度。碳化硼的平均熔化温度确定为T _ml在压力P _ml = 70（10）GPa时= 1900（500）K .