论爆炸多晶金刚石的特性与理论

Discussion on the theory and characteristics of explosive polycrystalline diamond

文中叙述的"爆炸多晶金刚石"是特指冲击波通过石墨粉体使之相变的多晶金刚石。文中展示出这种晶体结构的形态和特异点。介绍了两种"击波聚晶"的爆炸装置:圆管收缩爆炸装置和平面打击爆炸装置。指出计算压力和温度力学模型的重要性,计算压力的"均相分布"理论不被实验所证实。粉体中的金属粉既起打击板的作用,又起降低卸载温度的冷却作用。提出作者的对提高飞片打击速度有实效的有关专利。作者发现在常压下爆炸时的飞片下气体受绝热压缩后的聚能效应。

In this paper,the explosive polycrystalline diamond particularly refers to the polycrystalline diamond which is phase-transformed from graphite under the action of strong shock wave.It shows its morphological characteristics and distinguishing feature and recounts the two explosive unit for making polycrystalline diamond by shock wave： the explosive shrinkage unit of cylindrical tube and the explosive unit of planar shocking.It points out the importance of model to calculate pressure and temperature.The theory of homogeneous phase distribution for calculating pressure is not verified by experiments.The metal powder is taken both effect of striker to heighten the stress and cooler for reducing the temperature after stress discharge.The authors point out the effective patent to raise the velocity of flying plate and have discovered the accumulating effect of air subjected adiabatic compression which is under the flying plate at atmospherical pressure.