Influence of the grain size of high explosives on the duration of a high conductivity zone at the detonation

Abstract

At the detonation of condensed explosives, on the profile of electric conductivity is observed the area of high values, which is usually associated with the chemical reaction zone. The new interpretation of experimental data on the electrical conductivity allows one to diagnose the influence of the grain size on the charge structure and the reaction zone in the whole range of densities investigated. The reliability of the proposed hypotheses are investigated by the methods of statistical analysis. The level of confidence shows the consistency. The results of this paper are useful for the explosion physics, for the industrial production of nanodiamonds, for the miniaturization of explosive devices.

Microstructure Characterization of High Explosives by Wavelet Transform

“…e particle burn concept implies that the characteristic reaction rate in high explosives is proportional to the product of characteristic burning rate and specific surface area of high explosive particles. A large amount of data is available on the critical diameter which is proportional to the duration of the reaction zone and is also a characteristic of the chemical peak [16]. Ershov et al [17,18] investigated influences of particle sizes for cyclotrimethylene-trinitramine (RDX), cyclotetramethylene-tetranitramine (HMX), and pentaerythritol tetranitrate (PETN).…”

“…e explosive particle size and shape can be quantified by image processing techniques [16,20]. However, there is a lack of an easy, effective, and accurate method to quantify fabric anisotropy despite an abundance of evidence regarding the importance of it on mechanical and chemical behavior of high explosives.…”