结晶特性与制造工艺对炸药件力学性能的影响

通过对塑料粘结炸药(PBX)在压制、热老化及贮存中炸药HMX、TATB和粘结剂F的性能变化规律的研究,揭示了加工和贮存条件对炸药件的力学性能的影响。得出如下结论:1)随着老化温度的提高,粘结剂F结晶度增加。TATB基PBX炸药经老化后力学性能没有明显变化,说明粘结剂结晶度和炸药颗粒度的变化对炸药总体性能影响不大。2)钢模压制的TATB基PBX药柱在经历多次温度循环后,TATB与粘结剂F界面的作用有所减弱,药柱内部产生由脱粘引起的缺陷,其力学强度下降。TATB基PBX药柱的力学强度与模量均随着环境温度的升高而呈下降趋势,而等静压成型能明显改善TATB基PBX的力学性能。

The Effect of Crystal Characteristics and Manufacturing Processes on the Mechanical Properties of Composite Explosive

The effects of manufacturing processes and storage on the mechanical properties of explosives were rendered through studying the change of TATB,HMX explosives and binder F in PBX(plastic bonded explosive) during molding powder pressing,thermal processing,thermal aging and storage.Some conclusions can be obtained from the results.The crystallity of binder F increases with the aging temperature increasing.But generally,the mechanical properties of TATB-based PBX do not have any serious changes after being aged,which shows that the effect of the change of crystallinity of binder and the particle size on the performances of the explosives is not significant.After many thermal circles,for pillars of PBX based on TATB formed by the steel mould pressing,the mechanical strength of these pillars decreases.It might be caused by the interface dewetting between TATB and binder F.Aging process also makes the mechanical properties worse.Compared with the steel mould pressing,the isostatic pressing technology could significantly improve the mechanical properties of the PBX based on TATB.