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US 11,897,825 B2Granted
Visual and infrared signature powder and preparation methods thereof
AssigneeArmtec Defense Products Co.
InventorsRadana Dmitrovic, Willie Edward Benjamin, III, Rachel Hendrika Newell
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Abstract
Provided herein are VIS-IR powders comprising tin which show significantly higher visual intensity, reduced reaction temperature and particle temperature during and after oxidation reaction in air, and improved resistance to clumping when compared to comparable powders without tin. Methods of preparation of said VIS-IR powders are also disclosed.
Claims15
A method of preparing a visual and infrared signature composition (VIS-IR powder) comprising:
- mixing a first metal composition and a binder composition to provide a first mixture, wherein the first metal composition comprises aluminum and tin;
- mixing a first solid comprising at least a portion of the first mixture with a second metal composition to provide a second mixture, wherein the second metal composition comprises iron;
- heating the second mixture to provide an intermetallic composition;
- adding the intermetallic composition to a leaching solution providing a solid portion and a leached portion that contains the aluminum;
- separating the solid portion from the leached portion, wherein the solid portion comprises the tin and pyrophoric iron;
- and
- drying the solid portion to provide the VIS-IR powder.
4 more elements
Dependencies are inferred from the claim text.