Jump to navigation Jump to search For the English psych band, see The Explosive. For the American band The Explosives, see Roky Erickson. Demonstration of the explosive properties of three different explosives. Each explosive is detonation Island Vol. 9 PDF on a solid marble base and is initiated by a glowing wooden stick.
Författare: Tsutomu Takahashi.
An explosive material, also called an explosive, is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. Explosive materials may be categorized by the speed at which they expand. The remainder are too dangerous, sensitive, toxic, expensive, unstable, or prone to decomposition or degradation over short time spans. In contrast, some materials are merely combustible or flammable if they burn without exploding.
The distinction, however, is not razor-sharp. Certain materials—dusts, powders, gases, or volatile organic liquids—may be simply combustible or flammable under ordinary conditions, but become explosive in specific situations or forms, such as dispersed airborne clouds, or confinement or sudden release. At its root, the history of chemical explosives lies in the history of gunpowder. During the Tang Dynasty in the 9th century, Taoist Chinese alchemists were eagerly trying to find the elixir of immortality. A video describing how to safely handle explosives in mines.
The largest commercial application of explosives is mining. Whether the mine is on the surface or is buried underground, the detonation or deflagration of either a high or low explosive in a confined space can be used to liberate a fairly specific sub-volume of a brittle material in a much larger volume of the same or similar material. A thin plate of some material is placed atop a thick layer of a different material, both layers typically of metal. Atop the thin layer is placed an explosive.
At one end of the layer of explosive, the explosion is initiated. As the length of time the shock wave spends at any point is small, we can see mixing of the two metals and their surface chemistries, through some fraction of the depth, and they tend to be mixed in some way. It is possible that some fraction of the surface material from either layer eventually gets ejected when the end of material is reached. Hence, the mass of the now “welded” bilayer, may be less than the sum of the masses of the two initial layers. There are applications where a shock wave, and electrostatics, can result in high velocity projectiles. While these definitions are distinct, the problem of precisely measuring rapid decomposition makes practical classification of explosives difficult.