Accession Number : ADD013339

Title :   Metal-Cutting Pyrotechnic Composition.

Descriptive Note : Patent, Filed 22 Sep 80, patented 14 Sep 82,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Mueller, Kurt F ; Chang, Marguerite S ; Farncomb, Robert F ; Malotky, Lyle O

Report Date : 14 Sep 1982

Pagination or Media Count : 4

Abstract : A pyrotechnic composition, suitable for metal cutting, comprises an oxidizer selected from the class consisting of calcium sulfate hemihydrate, anhydrous calcium sulfate, magnesium monohydrate, anhydrous magnesium sulfate, anhydrous strontium sulfate, and mixtures thereof;a metal fuel,a halopolymeric binder;and sulfur. It is, therefore, an object of this invention to provide a high-temperature, low-gas-volume pyrotechnic composition prepared from inexpensive and readily available materials. Another object of the present invention is to dry-process a pyrotechnic composition with a long shelf-life and predictable performance. A further object of the present invention is to demilitarize ordnance cheaply and safely. These and other objects accomplished by the simultaneous reactions of a metal such aluminum with oxygen released by the decomposition of anhydrous calcium sulfate, calcium sulfate hemihydrate, anhydrous strontium sulfate, anhydrous magnesium sulfate, magnesium monohydrate, or a mixture thereof; a metal, such as aluminum with a halogen released by the decomposition of a halogenated hydrocarbon binder, and the reactions of sulfur and oxygen with iron in the work piece.

Descriptors :   *PATENTS, *CUTTING, *METALS, *PYROTECHNICS, ALUMINUM, MAGNESIUM, STRONTIUM, SULFATES, IRON, OXIDIZERS, CALCIUM COMPOUNDS, MAGNESIUM SULFATES, DECOMPOSITION, SHELF LIFE, HYDRATES, ORDNANCE, OXYGEN, TORCHES, DEMILITARIZATION, HALOGENATED HYDROCARBONS, BINDERS, STRONTIUM, POLYMERS, AMMUNITION CASES, MELTING, EXOTHERMIC REACTIONS, COMBUSTION, PREDICTIONS, SULFUR

Subject Categories : Pyrotechnics

Distribution Statement : APPROVED FOR PUBLIC RELEASE