Composite armor panel

• US 6,112,635 A
• Filed: 03/26/1998
• Issued: 09/05/2000
• Est. Priority Date: 08/26/1996
• Status: Expired due to Term

• Current Assignee: Mofet Etzion
• Original Assignee: Mofet Etzion
• Inventors: Cohen, Michael
• Primary Examiner(s): JOHNSON, STEPHEN
• Application Number:
  US09/048,628
• Time in Patent Office: 894 Days
• Field of Search: 89/36.01, 89/36.02, 109/82, 109/83, 109/84, 428/911
• US Class Current: 89/36.02
• CPC Class Codes: F41H 5/0414 Layered armour containing ceramic material
• CPC Class Codes: F41H 5/0428 Ceramic layers in combination with additional layers made of fibres, fabrics or plastics
• CPC Class Codes: F41H 5/0492 Layered armour containing hard elements, e.g. plates, spheres, rods, separated from each other, the elements being connected to a further flexible layer or being embedded in a plastics or an elastomer matrix
• CPC Class Codes: Y10S 428/911 Penetration resistant layer

Abstract

The invention provides a composite armor plate for absorbing and dissipating kinetic energy from high velocity, armor-piercing projectiles, the plate comprising a single internal layer of high density ceramic pellets which are directly bound and retained in plate form by a solidified material such that the pellets are bound in a plurality of adjacent rows, characterized in that the pellets have an Al₂ O₃ content of at least 93% and a specific gravity of at least 2.5, the majority of the pellets each have at least one axis of at least 12 mm length and are bound by the solidified material in a single internal layer of adjacent rows, wherein a majority of each of the pellets is in direct contact with at least 4 adjacent pellets, and the solidified material and the plate are elastic.

Claims

1. A composite armor plate for absorbing and dissipating kinetic energy from high velocity, armor-piercing projectiles, said plate consisting essentially of a single internal layer of high density ceramic pellets which are directly bound and retained in plate form by a solidified material such that the pellets are bound in a plurality of adjacent rows, wherein the pellets have an Al₂ O₃ content of at least 93% and a specific gravity of at least 2.5, the majority of the pellets each have at least one axis of at least 12 mm length., said one axis of substantially all of said pellets being in substantially parallel orientation with each other and substantially perpendicular to an adjacent surface of said plate, and wherein a majority of each of said pellets is in direct contact with six adjacent pellets and said solidified material and said plate are elastic.

2. A composite armor plate according to claim 1, wherein the majority of said pellets each have at least one axis having a length in the range of from about 12 to 40 mm and the weight of said plate does not exceed 185 kg/m².

3. A composite armor plate as claimed in claim 1, wherein the majority of said pellets each has a major axis in the range of from about 20 to about 30 mm.

4. A composite armor plate as claimed in claim 1, wherein said pellets are of a regular geometric form, having at least one convex curved surface segment.

5. A composite armor plate as claimed in claim 1, wherein said pellets have at least one circular cross-section.

6. A composite armor plate as claimed in claim 1, wherein said pellets are of round, flat-cylindrical or spherical shape.

7. A composite armor plate as claimed in claim 1, wherein each of a majority of said ceramic pellets along an edge of the plate is in direct contact with four adjacent pellets, while internal pellets in said plurality of rows within said plate are in direct contact with six adjacent pellets.

8. A composite armor plate as claimed in claim 1, wherein said pellets have a hardness of at least 9 on the Mohs scale.

9. A composite armor plate as claimed in claim 1, wherein said solidified material contains at least 80% aluminium.

10. A composite armor plate as claimed in claim 1, wherein said solidified material is a thermoplastic resin.

11. A composite armor plate as claimed in claim 1, wherein said solidified material is an epoxy.

12. A multi-layered armor panel, comprising:

an outer, impact-receiving panel of composite armor plate according to claim 1, for deforming and shattering an impacting high velocity, armor-piercing projectile; and

an inner layer adjacent to said outer panel, comprising a second panel of tough woven textile material for causing an asymmetric deformation of the remaining fragments of said projectile and for absorbing the remaining kinetic energy from said fragments,

wherein said multi-layered panel is adapted to stop three projectiles fired sequentially at a triangular area of said multi-layered panel wherein the height of said triangle is substanially equal to three times the axis of said pellets.

13. A multi-layered, armor panel according to claim 12, wherein said second panel is made of polyethylene fibers.

14. A multi-layered, armor panel according to claim 12, wherein said second panel is made of aramide synthetic fibers.

15. A multi-layered, armor panel according to claim 12, wherein said inner layer comprises multiple layers of a polyamide netting.

16. A multi-layered, armor panel according to claim 12, comprising a further backing layer of aluminum.