DNAN基熔铸炸药工艺特性

Technical Characteristics of DNAN-Based Melt-Casting Explosives

DNAN具有良好的低易损性能,为了更好地了解其在混合炸药应用中的优缺点,从而在其配方设计中打下良好的基础,对其工艺性能进行了研究。利用扫描电镜从微观结晶上和利用CT扫描等从宏观上对DNAN和TNT的熔铸工艺特性进行了对比分析。结果表明:在相同工艺条件下,DNAN的体积收缩比TNT更大,结晶过程中更容易形成缺陷;在混合炸药中,DNAN基炸药中加入固相时容易结团,凝固过程中更容易分层,这是由DNAN炸药本身的性质决定的,但通过加入助剂和改善工艺条件可以使DNAN具有良好的工艺和能量适应性,从而更好地应用于熔铸炸药中。

The good low-vulnerability had found in DNAN, the exploration for the technical characteristics of DNAN was conducted in order to better understand the merits and flaws of insensitive DNAN and apply it in the composite explosive formulations. The technical characteristics for DNAN and TNT was conducted by SEM from microcosmic crystallization and by CT and so on from macroscopic. The results showed that in the same processing condition, the bulk shrinkage of DNAN was bigger than that of TNT, and the flaws easily came into being in the process of crystallization. DNAN-based explosives, in which the solid components were easy to agglomerate in mixing resulted in delaminating, which were due to characteristics itself and were improved by incorporating aids and adjusting process parameters to make DNAN flexible, which made DNAN better apply to melt-casting explosives.