影响超细金刚石尺寸长大的限制机理

Effects of the Limiting Mechanism on the Growth of UDD

负氧平衡炸药爆轰产物中未被氧化的游离碳，在反应区内高温高压的作用下可以转化为纳米级的超细金刚石，这一过程可以近似用液滴的快速聚集动力学理论来描述．本文利用炸药爆温以及小粒子性质研究了超细金刚石生长过程中受到的尺寸限制条件．结果表明，超细金刚石粒子的准熔化相区域可能是影响其生长的限制条件，有关超细金刚石生长时间的估算支持上述结论．

The unfired free carbon in the detonation products of negative oxygenbalance explosives can be converted to the ultradispersed diamond(UDD),with nanometers sizes on the effects of high temperature and high pressure in the reactionzone.This process was described approximately by the rapid coagulation dynamics of liquid drops.The detonation temperature of explosives and the properties of small particals were used to research the limiting condition of the growth of UDD,and probably,the quasimelting regime of UDD particals can be regarded as this limiting condition.This result was supported by the simple calculation of the growth time of UDD in the reactionzone.