An investigation on the microscale detonation transmission performance of HMX-based explosive ink
Kai Han, Zhiyuan Feng, Qingfeng Liu, Chen Yang Li, Chuanhao Xu, Baoyun Ye, Bidong Wu, Jingyu Wang, Chongwei An
Abstract
To investigate the effect of Octogen (HMX) in the application of microscale explosive transfer sequence charges. In this paper, we designed and formulated four kinds of explosive inks with different solid contents using submicron HMX as the main explosive and polyvinyl alcohol (PVA) aqueous solution / fluorocarbon resin (FEVE) ethyl acetate solution emulsion as the binder system, studied the effect of solid content on the rheological properties of explosive inks, conducted micro loading studies using a direct ink writing molding platform, The morphology, safety performance and explosion transmission performance of the microscale printed molding samples were tested and analyzed. The results show that the ink containing 90 wt.% HMX explosive has the largest n value, has good printability, smooth surface of the molded sample, consistent, uniform particle dispersion inside the line; HMX crystalline type is still β type; critical impact energy and critical friction of the printed sample compared to the raw HMX increased by 114% and 100% respectively, critical impact energy compared to CL-20-based explosive ink printed sample increased by 67%, indicating that the printed samples have a high safety under the Mechanical Sensitivity. The detonation velocity of the printed sample is 6902 m·s−1 at a charge cross-section size of 1 mm × 1 mm. The critical detonation thickness of the printed sample is 1 × 0.095 mm, Can be stable under the corner of not more than 120 ° detonation.The results of the study show that HMX as the main charge can improve the wide applicability of direct-written explosive ink.