Application of a New Cleaner Emulsion‐Explosive Formula: Cu/Al Parallel Plates Explosive Welding

Abstract

This paper introduces a new cleaner emulsion‐explosive formula and uses it in the copper/aluminum parallel plates explosive welding, with the benefits of decreasing the overall cost of emulsion explosive product and minimizing environmental pollution during use. After the welding experiment, sample's welding quality was firstly evaluated via the X‐ray tomography (XCT), optical microscopy (OM) and scanning electron microscopy (SEM). On the other hand, the energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM) and X‐ray diffraction (XRD) analysis are utilized to identify the kinds of inter‐metallic compounds of samples. Our results reveal that the metal/metal interface obtained using the new emulsion explosive is more regular and wavy, and the inter‐metallic compounds, caused by rapid solidification and further cooling of the dissimilar partners, are confirmed as Al2Cu and AlCu.

Detonation characterization of low‐density emulsion explosives

“…The use of high energy explosives [22,23], different gases in the sensitization process [24], metal powders [21,25,26] or incorporating chemical elements to the EEs formulation [27,28] are some of the additives used to ensure the enhancement of some of the detonation parameters of the EEs. On the other hand, in applications like shock synthesis of materials [29], metal welding or cladding [30][31][32][33][34][35][36], where non-energetic additives are used, mainly for the reduction of the EE density. In these cases, the adjustment and reduction of some of the detonation parameters are more important than increasing the destructive power of EEs.…”

“…In these cases, the adjustment and reduction of some of the detonation parameters are more important than increasing the destructive power of EEs. Some of these non-energetic additives consist of industrial slats [37], metal powders [38,39], common clay [33], or expanded polystyrene spheres (EPS) [32,36]. It has been proven by several researchers, that EEs can fulfil the needed requirements by adjustment of their density.…”

Preparation and Performance of ANPyO/Emulsion Explosive Composite Energetic System

“…However, for metal materials with low strength and toughness, the detonation velocity of emulsion explosive itself is most likely due to high energy release power during explosive recombination, thereby increasing the likelihood of destruction of the structure of the metal material. Further, affecting the forming effect [17]. Therefore, for this kind of metal material, the emulsion explosive usually be treated at a low density before using it in the explosive cladding.…”