Propellants and explosives with flouro-organic additives to improve energy release efficiency

• US 6,843,868 B1
• Filed: 10/23/2003
• Issued: 01/18/2005
• Est. Priority Date: 10/23/2003
• Status: Expired due to Fees

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Fawls, Christopher J., Wagaman, Kerry L., Fields, Joel P.
• Primary Examiner(s): FELTON, AILEEN BAKER
• Application Number:
  US10/691,220
• Time in Patent Office: 453 Days
• Field of Search: 149/19.3, 149/22
• US Class Current: 149/19.3
• CPC Class Codes: C06B 27/00 Compositions containing a metal, boron, silicon, selenium or tellurium or mixtures, intercompounds or hydrides thereof, and hydrocarbons or halogenated hydrocarbons

Abstract

A non-/low-toxic, non-hypergolic, propellant formulation generally comprising metal nanoparticles, such as boron, aluminum, or carbon, and one or more fluoro-polymers mixed in in particulate form. The present invention takes advantage of the increased surface area provided by nano-sized metallic particles to enhance the metal'"'"'s combustion efficiency, or ignitability. The inclusion of fluoro-polymers also aids in increasing the combustion efficiency of the metallic nanoparticles due to the presence of halogenic oxidizers. The thermal degradation of a halogenated fluoro-polymer additive in the propellant combustion zone serves to release halogens, thereby improving the combustion of the metallic nanoparticles and increasing the propulsion system'"'"'s energy output. The present invention'"'"'s formulation is safe to store and handle, environmentally-friendly, and may be economically manufactured to provide for widespread, cost-effective use.

Claims

1. An improved poly-metallic energetic formulation, the original poly-metallic energetic formulation having a fuel comprising metallic nanoparticles, wherein the improvement comprises:

a solid particulate fluoro-organo or fluoro polymeric compound mixed into said original poly-metallic energetic formulation in an amount ranging from approximately 1 to 98 weight percent of the improved poly-metallic energetic formulation;

wherein during combustion of the improved poly-metallic energetic formulation a metallic fluoride intermediate is formed on the fuel and halogens are released to improve combustion efficiency of the improved poly-metallic energetic formulation over the original poly-metallic energetic formulation.

2. The improved formulation according to claim 1 wherein said fuel comprises boron.

3. The composition according to claim 1 wherein said fuel comprises aluminum.

4. The composition according to claim 1 wherein said fuel comprise carbon.

5. The composition according to claim 1 wherein said fluoro-polymer comprises a powder.

6. The composition according to claim 1 wherein said fluoro-polymer is selected from dipolymers of VF2/HFP, termpolymers of VF2/HFP/TFE, or copolymers of TFE/propylene and ethylene/TFE/AMVE.

7. The composition according to claim 1 wherein said fluoro-polymer comprises polytetraflouroethylene.