Published in Combustion, Explosion, and Shock Waves
AbstractThis paper describes the effect of preliminary mechanical activation (MA) and Ti content on maximum temperature, maximum burning rate, composite particle size, mixture yield after MA, sample elongation during combustion, and the phase composition and morphology of combustion products in the Ni–Ti–Al system. The preliminary MA of a Ni + Al +...
Published in Combustion, Explosion, and Shock Waves
AbstractThe Hedvall effect was implemented in self-propagating high-temperature synthesis (SHS) in TiNi + 1.1C and Ni3Al + 1.2Si low-calorific-value compositions using preliminary mechanical activation (MA) in a high-energy planetary ball mill. The dependences of the initiation temperature and the maximum reaction temperature on MA time were obtain...
Published in Combustion, Explosion, and Shock Waves
AbstractThis paper describes the results of a numerical study pertaining to the interruption of detonation wave propagation in monofuel–air mixtures by a layer of inhomogeneous inert particles. It is shown that layer diameter, layer length, and the inhomogeneity of inert particles affect this process. It is revealed that, if the total mass of the m...
Published in Combustion, Explosion, and Shock Waves
AbstractThe brightness temperature of polymethyl methacrylate subjected to a shock wave reflected from a transparent LiF or sapphire window was measured by a pyrometric method. The pressure range in the primary wave was 20–40 GPa, and that in the reflected wave was 30–78 GPa. At an intensity of the primary shock wave in the range of low pressures (...
Published in Combustion, Explosion, and Shock Waves
AbstractThe influence of controlled perturbations on the buckling of conical liners during their explosive compression is under study. In this case, there is folding on the inner surface of the liners, oriented along the cone generatrix. It is revealed that, as the Reynolds number increases, so does the number of folds, with the geometric dimension...
Published in Combustion, Explosion, and Shock Waves
AbstractCo–C nanoparticles are synthesized via the detonation of benzene and oxygen with cobalt(III) acetylacetonate as a precursor, and the influence of heat treatment on their physical performances is explored. The results indicate that the crystallinity and degree of graphitization of Co–C nanoparticles are dramatically improved after heat treat...
Published in Combustion, Explosion, and Shock Waves
AbstractThis paper addresses the effect of oxidizer particle orientation on the burning rate of ammonium-perchlorate-based heterogeneous solid propellants. Mesoscale numerical simulations are conducted assuming that oxidizer particles are ellipsoidal and have different orientations with respect to the combustion direction. The particle orientation ...
Published in Combustion, Explosion, and Shock Waves
AbstractDetonation nanodiamonds (DND) represent a unique material combining the properties of a rather passive diamond core with an active carbon shell. The effect of disaggregated DND (T-DND) and detonation carbon [diamond batch mixture (T-DBM)] obtained in an explosion of tetryl (2,4,6-trinitro-N-methyl-N-nitroaniline) and preliminary deposited o...
Published in Combustion, Explosion, and Shock Waves
AbstractCombustion during self-propagating high-temperature synthesis of Ti + 1.7B reaction tapes obtained by rolling from a powder mixture is experimentally investigated. Dependences between the combustion wave propagation velocity in the reaction tapes and the applied pressure are revealed. It is shown that the burning rate of the tapes weakly de...
Published in Combustion, Explosion, and Shock Waves
AbstractThis paper presents the results of sound velocity measurements performed in natural uranium during the high-rate strain of sound in \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt...
