Shaped charge liner and method for production thereof

Patent metadata

Field	Value
Publication number	US-11162766-B2
Application number	US-201816766342-A
Country	US
Kind code	B2
Filing date	Nov 23, 2018
Priority date	Nov 29, 2017
Publication date	Nov 2, 2021
Grant date	Nov 2, 2021

Abstract

The present invention relates to a liner for shaped charge for penetrating hard targets, wherein the liner comprises i) a carrier having a density below 9500 kg/m3; and ii) a coating deposited on said carrier comprising at least one metal and/or metal oxide, wherein the coating has a density greater than 10000 kg/m3; wherein the thickness ratio of the carrier to the coating ranges from 100:1 to 1:1, and wherein the oxygen content in the coating is less than 100 ppm atomic. The invention also relates to a method of producing such shaped charge liner and the use 0 thereof in a projectile for penetrating a hard military target.

First claim

The invention claimed is:

1. A liner for shaped charge for penetrating hard targets, the liner comprising:
a carrier having a density below 9500 kg/m 3 ; and
a coating deposited on said carrier so as to form a penetrating portion of a forming jet of the shaped charge, whereby the penetrating portion consists of the material of the coating,
wherein:
the coating comprises at least one metal;
the coating has a density greater than 10000 kg/m 3 ;
the thickness ratio of the carrier to the coating ranges from 100:1 to 1:1; the oxygen content in the coating is less than 100 ppm;
the metal of the coating is selected from tungsten, lead, molybdenum, silver, tantalum, platina, or mixtures thereof; and
the average particle size of the coating ranges from 0.1 to 100 nm.

2. Liner according to claim 1 , wherein the density of the carrier is lower than 9000 kg/m 3 .

3. Liner according to claim 1 , wherein the coating has a density greater than 15000 kg/m 3 .

4. Liner according to claim 1 , wherein the coating has a density greater than 18500 kg/m 3 .

5. Liner according to claim 1 , wherein the carrier is a metal, metal oxide, plastics, ceramics, or a mixture thereof.

6. Liner according to claim 1 , wherein the carrier has a thickness ranging from 0.5 to 5 mm.

7. Liner according to claim 1 , wherein the coating has a thickness ranging from 0.05 to 0.5 mm.

8. Liner according to claim 1 , wherein the carrier consists of copper.

9. Liner according to claim 1 , wherein the coating consists of tungsten.

10. Liner according to claim 1 , wherein the porosity of the coating ranges from about 0 to 3%.

11. Liner according to claim 1 , wherein the weight ratio of the coating to the carrier ranges from 1:5 to 1:1.

12. Method of producing a shaped charge liner according to claim 1 , wherein the coating is deposited on the carrier.

13. Method according to claim 12 , wherein the coating is deposited by means of gas condensation, sputtering deposition or electrodeposition techniques.

14. Method according to claim 12 , wherein the coating is deposited by means of chemical vapour deposition.

15. Method according to claim 12 , wherein tungsten is deposited on copper.

16. Method according to claim 12 , wherein tungsten is deposited on copper by means of chemical vapour deposition.

17. Method according to claim 12 , wherein an intermediate layer is formed on the carrier prior to deposition of said coating.

18. Use of a shaped charge liner according to claim 1 in a projectile for penetrating a hard military target.

19. Liner according to claim 1 , wherein the average particle size of the coating ranges from 50 to 100 nm.

20. A liner for shaped charge for penetrating hard targets, the liner comprising:
a carrier having a density below 9500 kg/m 3 ; and
a coating deposited on said carrier so as to form a penetrating portion of a forming jet of the shaped charge, whereby the penetrating portion consists of the material of the coating,
wherein:
the coating comprises at least one metal;
the coating has a density greater than 10000 kg/m 3 ;
the thickness ratio of the carrier to the coating ranges from 100:1 to 1:1; the oxygen content in the coating is less than 100 ppm;
the metal of the coating is selected from tungsten, lead, molybdenum, silver, tantalum, platina, or mixtures thereof; and
the porosity of the coating ranges from about 0.0001 to 1.5%.

21. Liner according to claim 20 , wherein the porosity of the coating is selected from one of the following ranges: about 0.0001 to 0.5% and about 0.0001 to 0.3%.

Assignees

• Saab Ab

Inventors

• Sillanpaeae Sofia
• Widlund Thomas

Classifications

• F42B1/032 Primary

  characterised by the material of the liner · CPC title

• F42B1/036

  Manufacturing processes therefor {(F42B33/0214 - F42B33/0292 take precedence)} · CPC title