Reactive material enhanced munition compositions and projectiles containing same

a technology of enhanced munition and projectiles, which is applied in the field of reactive materials, can solve the problems of fuel-filled targets, mk211, m8 and m20 api projectiles having limited effectiveness against thin-skinned targets, and it is difficult to inflict catastrophic damage on thin-skinned targets using long-range guns

Inactive Publication Date: 2005-09-15
ORBITAL ATK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019]FIGS. 54-56 are bar graphs that summarize reactive material formulations that provide good target damage, plume size, and pressure output, respectively.

Problems solved by technology

Historically, it has been difficult to inflict catastrophic damage on thin-skinned targets using a long-range gun.
The problem is even more pronounced with thin-skinned, fuel filled targets, such as fuel tanks, fuel containers, or fuel storage facilities.
As such, the MK211, M8, and M20 API projectiles have limited effectiveness against thin-skinned targets.

Method used

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  • Reactive material enhanced munition compositions and projectiles containing same
  • Reactive material enhanced munition compositions and projectiles containing same
  • Reactive material enhanced munition compositions and projectiles containing same

Examples

Experimental program
Comparison scheme
Effect test

example 1

Formulations of the Reactive Materials

[0037] Formulations of the reactive materials of the present invention are shown in Tables 1-3. Formulations of intermetallic and thermite compositions are shown in Table 1.

TABLE 1Formulations of Intermetallic and Thermite Reactive Materials.Ingredient 1Ingredient 2Ingredient 3Ingredient 4Mix NumberNameWt. %NameWt. %NameWt. %NameWt. %1791-97-10Zr34.62CuO60.82Viton A5——1791-97-11Al17.52CuO77.48Viton A5——STR: 22235Al-5μ44.2PTFE55.8————STR: 22037Al-5μ28.3PTFE71.7————STR: 22080Al-H9528.3PTFE71.7————1836-90CPhenolphthalein20.5KNO3-15μ46.5KClO4-9μ30 PVA3  1836-90DPhenolphthalein15.6KNO3-15μ51.4KClO4-9μ30 PVA3  STR: 22610SrNO366.54Mg31.71Nylon  1.75——1791-100-1W-690 nm82.2KP-5μ10.3Viton A  7.5——1791-100-2W-690 nm72.2KP-5μ20.3Viton A  7.5——1943-77ANano-Al26PTFE74————2002-1-1Zr47.7PTFE52.3————1943-77BNano-Al27MoO323PTFE50 ——1943-77DZn56.75PTFE43.25————1661-60AMagnalium24.5BCN-12.5μ68.5Ethyl Cellulose7——1661-60DAl27.5BCN-12.5μ68.1Ethyl Cellulose  4.5——...

example 2

Safety Testing of the Reactive Material Formulations

[0041] Safety testing was performed on the reactive material formulations described in Example 1. Friction properties of the formulations were measured using a friction test developed by Allegheny Ballistics Laboratory (“ABL”). Onset of ignition exotherms and sensitivity to elevated temperatures of the formulations was measured using a Simulated Bulk Autoignition Test (“SBAT”). Electrostatic discharge (“ESD”) of the formulations was measured using an ESD test developed by Thiokol Corporation (“TC”). Impact properties of the formulations were measured using an impact test developed by TC and an impact test developed by ABL. Deflagration to detonation (“DDT”) transitions of the formulations was also measured. These tests are known in the art and, therefore, details of these tests are not included herein. The safety properties were used to determine whether the reactive materials had a low level of sensitivity (green line (“GL”)), an...

example 3

Reactive Material Bullets Including the Reactive Material Formulations

[0046] Twenty four formulations were loaded into a reactive material bullet by pressing the reactive material into the core of the bullet case from the front. In addition to the formulations shown in Tables 7 and 8, Formulations 1943-32-02, 1943-32-04, 1943-32-05, 1943-32-06, 1943-32-08, 1943-32-09, 1943-32-10, 1943-32-17, and 1791-100-1 were also tested. The tip was then inserted into the case to form the reactive material bullet. The formulations were tested in a reactive material bullet designed to penetrate a thin-skinned target, referred to herein as the bullet for thin-skinned targets, or in a reactive material bullet having increased penetration and designed to penetrate a thicker-skinned target, referred to herein as the bullet for thicker-skinned targets.

[0047] Energy release and initiation threshold of the reactive material formulations was determined by firing the reactive material bullets 2 from a 50...

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Abstract

A reactive material that includes at least one of a fuel, an oxidizer, and a class 1.1 explosive and is formulated for use in a reactive material projectile. The reactive material is formulated to provide at least one of an overpressure of greater than approximately 9 pounds per square inch at a radial measurement of 12 inches from a point of impact on a target, a hole greater than approximately 2 square inches at an optimum penetration level in a target, and pressure, damage, and a flame when the reactive material bullet impacts a target. The fuel may be a metal, a fusible metal alloy, an organic fuel, or mixtures thereof. The oxidizer may be an inorganic oxidizer, sulfur, a fluoropolymer, or mixtures thereof. A reactive material projectile having the reactive material disposed therein is also disclosed.

Description

FIELD OF THE INVENTION [0001] The present invention relates to reactive materials and, more specifically, to reactive materials suitable for use in a munition, such as a reactive material projectile, as well as to munitions in the form of projectiles containing the reactive materials. BACKGROUND OF THE INVENTION [0002] Historically, it has been difficult to inflict catastrophic damage on thin-skinned targets using a long-range gun. The problem is even more pronounced with thin-skinned, fuel filled targets, such as fuel tanks, fuel containers, or fuel storage facilities. Conventional projectiles, such as MK211, M8, or M20 armor piercing incendiary (“API”) projectiles, are designed to penetrate armor plating and to provide an incendiary flash. To provide the penetrating effects, the MK211, M8, and M20 API projectiles typically include a fill material that is an incendiary composition. For instance, in the MK211, the fill material includes zirconium sandwiched between Composition B. Wh...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C06B25/00C06B27/00C06B33/08C06B45/00C06B45/04C06B45/10C06D5/06F42B12/02F42B12/20F42B12/36F42B12/44F42B12/74
CPCC06B27/00C06B33/08C06B45/04F42B12/44F42B12/204F42B12/205F42B12/207C06B45/105C06B25/00C06B33/02
Inventor NIELSON, DANIEL B.ASHCROFT, BENJAMIN N.DOLL, DANIEL W.
Owner ORBITAL ATK INC
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