Composite reactive multilayer foil

Details Composite reactive multilayer foil Composite reactive multilayer foil

2005-03-08

2005-03-08

Koehler, Robert R. (Department: 1775)

Stock material or miscellaneous articles

All metal or with adjacent metals

Foil or filament smaller than 6 mils

C428S615000, C428S635000, C428S650000, C428S652000, C428S656000, C428S680000, C428S924000, C428S926000, C428S941000

Reexamination Certificate

active

06863992

ABSTRACT:
Reactive foils and their uses are provided as localized heat sources useful, for example, in ignition, joining and propulsion. An improved reactive foil is preferably a freestanding multilayered foil structure made up of alternating layers selected from materials that will react with one another in an exothermic and self-propagating reaction. Upon reacting, this foil supplies highly localized heat energy that may be applied, for example, to joining layers, or directly to bulk materials that are to be joined. This foil heat-source allows rapid bonding to occur at room temperature in virtually any environment (e.g., air, vacuum, water, etc.). If a joining material is used, the foil reaction will supply enough heat to melt the joining materials, which upon cooling will form a strong bond, joining two or more bulk materials.

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