Abstract

Crystalline powder boron carbide samples are subjected to explosive loading by 2-μs shock waves with an amplitude of 38 GPa and shock heating to 700 K and to subsequent conservation. The samples recovered after shock-wave loading are studied by X-ray diffraction, and new effects of shock-wave loading on boron carbide are revealed. The explosive treatment is shown to shift the X-ray diffraction reflections of initial boron carbide toward high angles, which is attributed to an increase in the boron carbide density at the level of atomic volume in the unit cell of boron carbide. The X-ray diffraction reflections are found to broaden, which is interpreted as an increase in the coherent scattering region in the crystalline boron carbide subjected to the explosive treatment.

中文翻译：

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冲击波加载过程中结晶碳化硼的致密化

摘要

结晶粉末状碳化硼样品受到2-μs振幅38 GPa的冲击波的爆炸载荷，并加热到700 K，然后保存。通过X射线衍射研究了冲击波载荷后回收的样品，并揭示了冲击波载荷对碳化硼的新作用。爆炸处理显示出将初始碳化硼的X射线衍射反射移向高角度，这归因于碳化硼晶胞中原子体积水平的碳化硼密度增加。发现X射线衍射反射变宽，这被解释为经受爆炸处理的结晶碳化硼中相干散射区域的增加。