Shell Projectile Wikipedia This document provides definitions and concepts related to explosive materials. it describes black powder, the first explosive material, which was developed in china and used in firecrackers, rockets, and later weapons in europe. The ingredients used in the manufacture of gunpowder are charcoal, nitre (or saltpetre), and sulphur; and in order to explain the phenomena of explosion, a short description of each of these substances will be given.
High Explosive Projectile High Explosive Fragmentation Projectile Sensitive materials that can be exploded by a relatively small amount of heat or pressure are called primary explosives (e.g. nitroglycerine, lead azide), and more stable materials secondary explosives (e.g. tnt, anfo). Until the introduction of smokeless power, black powder (also called “gunpowder”) was the sole propellant for artillery, long arms, and small arms. commonly attributed to the chinese, it may also have arab or english origins. The composition of these energetic materials varies among primers, igniters, and propellants; and the three different chemical mixes used vary with the weapon system. Consequently, at the very high temperature of explosion, these gases exert an enormous pressure which does work either in disrupting the body in which the explosive has been fired, as in the case of a rock or of a military shell, or by driving a projectile out of a gun.
Gunpowder Properties And Uses Pdf Gunpowder Explosion The composition of these energetic materials varies among primers, igniters, and propellants; and the three different chemical mixes used vary with the weapon system. Consequently, at the very high temperature of explosion, these gases exert an enormous pressure which does work either in disrupting the body in which the explosive has been fired, as in the case of a rock or of a military shell, or by driving a projectile out of a gun. Because of this expansion, an explosion exerts a mechanical force sufficient to burst a sealed container or force a projectile out of a gun. there are two classifications of explosives, categorized according to the speed with which the reaction moves through the system. Gun propellants are simply combustible materials that burn rapidly without external oxygen and convert their current state (solid or liquid) into a gas through an exothermic reaction. Tem perature of 10°c. more than doubles the velocity of a chemical reaction. the temperature mounts rapidly; gas is produced suddenly; an explosion ensues. the powder burns; the cracker explodes. and in still other cases we have materials which them selves explode. the molecules undergo suc. Also, it may be a single chemical compound (tnt), a mixture of explosive compounds [a mixture of tnt and ammonium nitrate ( an , nh 4no 3)] or a mixture of two or more substances, none of which in itself needs be an explosive (gunpowder – mixture of charcoal, sulfur and potassium nitrate).
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