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Phosphorus pentabromide is a reactive, yellow solid of formula P Br 5, which has the structure [PBr 4] + Br − (tetrabromophosphonium bromide) in the solid state but in the vapor phase is completely dissociated to PBr 3 and Br 2.
Aluminium oxynitride (marketed under the name ALON by Surmet Corporation [3]) is a transparent ceramic composed of aluminium, oxygen and nitrogen.Aluminium oxynitride is optically transparent (≥80% for 2 mm thickness) in the near-ultraviolet, visible, and mid-wave-infrared regions of the electromagnetic spectrum.
Ammonium perchlorate composite propellant (APCP) is a solid rocket propellant. It differs from many traditional solid rocket propellants such as black powder or zinc-sulfur, not only in chemical composition and overall performance but also by being cast into shape, as opposed to powder pressing as with black powder. This provides manufacturing ...
Most Air Force personnel could not figure out how to apply the techniques of manufacturing's quality control to most of the duties of their Air Force missions, which are often human services depending upon individual skills, with little repetition and numerous exceptions, and difficult to measure in physical terms.
Dry lubricants or solid lubricants are materials that, despite being in the solid phase, are able to reduce friction between two surfaces sliding against each other without the need for a liquid oil medium. [1] The two main dry lubricants are graphite and molybdenum disulfide. They offer lubrication at temperatures higher than liquid and oil ...
At high temperatures (700–1100 °C) and in the presence of a metal-based catalyst , steam reacts with methane to yield carbon monoxide and hydrogen. Hydrogen is very bulky compared to other fuels; it is typically stored as a cryogenic liquid, a technique mastered in the early 1950s as part of the hydrogen bomb development program at Los Alamos .
CERCLA, passed by Congress in 1980, authorized EPA to create a list of polluted locations requiring a long-term response to clean up hazardous-material contamination. [1] These locations are designated as Superfund sites, and are placed on EPA's National Priorities List (NPL).
There are two likely paths once the molecules reach the metallic surface. First the molecule may adsorb onto the metal surface thereby forming a barrier to aggressive ions and displacing any condensed water. [6] [7] The second path involves the condensed water layer that has been shown to exist on the metallic surface. [8]