Pressure-Induced In Situ Construction of P-CO/HNIW Explosive Composites with Excellent Laser Initiation and Detonation Performance

Abstract

Laser initiation is a popular research topic in the energetic community. Particularly, the direct ignition of secondary explosives by laser ignitors is considered to be an advanced strategy for enhancing safety and promoting the miniaturization of weapons. Here, to improve the laser sensitivity of secondary explosives, P-CO synthesized under high pressure was employed as a coating for HNIW owing to its laser sensitivity and excellent energetic properties. In this operation, HNIW underwent an obvious isostructural phase transition from the ε-phase to the γ′-phase in the pressure range of 1.0–4.8 GPa. Subsequently, sub-nanoscale HNIW-based composites were formed when CO in situ polymerized to P-CO on the surfaces of HNIW at 5.1 GPa. This HNIW-based composite could be ignited at a much lower laser power (0.49–0.65 W) compared with pure HNIW (2.75–2.98 W) when excited by an Nd:YAG laser with a wavelength of 1064 nm. Additionally, the DFT calculations demonstrated that the arrangement density between HNIW and P-CO was significantly enhanced as the pressure increased. Thus, the introduction of advanced materials into explosive formulations through high-pressure technology is a novel and feasible strategy for developing multipurpose energetic materials.

Smart Host–Guest Energetic Material Constructed by Stabilizing Energetic Fuel Hydroxylamine in Lattice Cavity of 2,4,6,8,10,12-Hexanitrohexaazaisowurtzitane Significantly Enhanced the Detonation, Safety, Propulsion, and Combustion Performances

“…Energetic materials, including propellants, explosives, and pyrotechnics, are a class of special reactive substance that store high amounts of chemical energy and can release a large amount of heat and high-pressure gases for space propulsion or engineering blasting when they are appropriately triggered. , Owing to the increase in the necessity of developing HEDMs in the industry and academia, traditional single-purpose explosives cannot satisfy the requirements of modern civil, military, and space projects. The novel HEDMs should have better comprehensive performances in terms of energy density, safety, thermal stability, specific impulse, and combustion than the widely used single explosives, such as 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) and 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX). , Hence, the energetic community is currently focusing on the development of a promising strategy for designing and preparing various multipurpose HEDMs.…”

“…The novel HEDMs should have better comprehensive performances in terms of energy density, safety, thermal stability, specific impulse, and combustion than the widely used single explosives, such as 1,3,5-trinitro-1,3,5triazacyclohexane (RDX) and 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX). 3,4 Hence, the energetic community is currently focusing on the development of a promising strategy for designing and preparing various multipurpose HEDMs.…”

Thermal Reactivity of High-Density Hybrid Hexahydro-1,3,5-trinitro-1,3,5-triazine Crystals Prepared by a Microfluidic Crystallization Method

“…1 To balance the high energy density, promising thermal stability, low sensitivity, and less toxicity, various inert materials, such as carbon nanotubes (CNTs), graphene oxide (GO), polydopamine (PDA), 2 and other insensitive polymers, 3 have been used to modify EMs. 4 Among the currently used high-energy organic EMs, octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX), 5 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20), 6 and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) 7 have been widely modified using these materials to meet the requirements of space application and military weapons.…”

Raman spectroscopy and X‐ray diffraction of diphenylphosphoryl azide under high pressures

“…[17][18][19][20][21][22] However, the electron orbital hybridization in symmetric and linear azide ions is difficult to occur, which limits the researches and applications of polymeric nitrogen. [23][24][25][26][27] Therefore, we focus on organic azides that are considered easier to form polymeric nitrogen than that of inorganic azide.…”