# US 5,348,597 A · Propellant formulation and process containing bi-metallic metal mixture

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- Number: US 5,348,597 A
- Document ID: US5348597A
- Status: Granted
- Kind: A
- Application number: 07/440,397
- Filed: 1989-11-07
- Granted: 1994-09-20
- Earliest claimed: 1988-11-10
- Assignees: Composite Materials Technology, Inc.
- Inventors: James Wong
- Web page: https://patentgrep.com/patent/US5348597A

## CPC

- C06B 45/00: Compositions or products which are defined by structure or arrangement of component of product (explosive charges of particular form or shape F42B1/00, F42B3/00)
- Y10S 149/114: Inorganic fuel
- C06B: EXPLOSIVES OR THERMIC COMPOSITIONS (blasting F42D); MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES (compounds in general C01, C07 or C08; {demolition agents based on cementitious or like materials C04B41/0009})
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

The present invention relates to metal filaments for use as fuel additives for rocket propellants, explosives, and other pyrotechnic devices. Preferred filaments are those such as zirconium, niobium and titanium (and alloys thereof) which have very high heat of combustion.

## Claims

### Claim 1

An explosive device such as a propellant comprising a normal organic propellant and oxidizer and a controlled amount of metal filaments from the group consisting of Aluminum, Zirconium, Titanium, and Niobium and alloys thereof having a predetermined substantially uniform surface to volume ratios, the metallic filament including a bi-metallic mixture of two additional metals having a high heat of solution.

### Claim 2 (depends on 1)

The product of claim 1 wherein the bi-metallic metals are palladium and aluminum.

### Claim 3 (depends on 1)

The product of claim 1 wherein the bi-metallic metals are nickel and aluminum.

### Claim 4

A bi-metallic filament of aluminum and another metal from the group of nickel and palladium, said filament having a diameter less than 20 microns and comprising multiple thin longitudinal portions of at least one of said metals in intimate contact with the other of said metals, the radial cross-section of said thin portions being less than 3 microns.

### Claim 5 (depends on 4)

The filament of claim 4 wherein said thin portions are thin layers.

### Claim 6 (depends on 4)

The filament of claim 4 wherein said thin portions are thin fibers.