Study on the Effect of NTO on the Performance of HMX-Based Aluminized Cast-PBX

Abstract

3-Nitro−1,2,4-triazol−5-one (NTO) is an explosive with broad application prospects. To study the effect of NTO content on the properties of HMX-based cast-PBX (polymer bonded explosive), five different HMX/NTO-based cast-PBXs were prepared and characterized by experiments and simulations. The results show that the addition of NTO is beneficial to reduce the mechanical sensitivity of cast-PBX, but will reduce the energy level of cast-PBX. We then found that with the increase in NTO content, cast-PBX showed a trend of first increasing and then decreasing in terms of mechanical properties, specific heat capacity (Cp) and thermal conductivity (λ). In addition, we found that the Gurney energy (Eg) of N30 is 2.31 kJ/g. Finally, the increase in NTO content greatly improves the thermal safety performance of the cast-PBXs, and numerical simulation of slow cook-off can be used as one reliable method to obtain the ignition location, ignition temperature and the transient temperature distribution.

Special Issue “Extreme Mechanics in Multiscale Analyses of Materials”

“…The papers included in this Special Issue deal with a broad spectrum of interests in analytical, computational, and experimental studies on extreme types of material behaviour. The included papers encompass many areas of extreme mechanics modelling including: a strength investigation using detailed microfractography analysis of fractures formed during static tensile tests of steel Armstal 550 [ 1 ], a study on the effect of NTO content on the properties of an HMX-based cast-PBX (polymer bonded explosive) [ 2 ], the dependency of contact length on cutting speed and other variables performed by the optical method in cutting processes [ 3 ], bone molecular models at the nanoscale [ 4 ], molecular models of bones at the nanoscale, the characterisation of composites’ mechanical behaviour at low temperatures [ 5 ], the diffusion of hydrogen atoms through the grain boundaries of materials, the failure properties of batteries under axial forces [ 6 ], the deformation and failure properties of Ni lithium batteries [ 7 ], the effect of material heterogeneity on the environmentally assisted cracking growth rate of Alloy 600 for safe-end welded joints [ 8 ], the high strain yielding of the additive manufacturing of Inconel 625 through laser melting [ 9 ], the effect of the yield strength distribution of welded joints on the crack propagation path and the crack mechanical tip field [ 10 ], the effect of mechanical heterogeneity on strain and stress fields at crack tips of SCC in dissimilar metal welded joints [ 11 ], and the characterisation of mechanical heterogeneity in dissimilar metal welded joints [ 12 ].…”