Reactive material enhanced projectiles, devices for generating reactive material enhanced projectiles and related methods
View Patent ↗A liner assembly for an explosively formed projectile device may include a reactive material liner and a primary liner configured to form into a projectile responsive to initiation of an explosive material. The reactive material liner may be configured and formulated to increase the velocity of the projectile after formation thereof. An ordnance device for generating an explosively formed projectile may include a case, an explosive material, and a reactive material liner and a primary liner configured, in combination, to form into a projectile. An explosively formed projectile may include a deformed primary liner and a deformed reactive material liner having an ignited portion increasing the velocity of the projectile. Methods of explosively forming a projectile may include explosively expelling a primary liner and a secondary liner and increasing the velocity of the projectile by combusting at least a portion of the secondary liner.
1. A method of explosively forming a projectile, the method comprising:
explosively expelling a primary liner and a secondary liner comprising a reactive material from a case;
deforming the primary liner to at least partially surround a portion of the secondary liner; and
after deforming the primary liner to at least partially surround the portion of the secondary liner, increasing a velocity of the projectile by combusting at least a portion of the secondary liner.
2. The method of claim 1 , further comprising igniting a portion of the secondary liner as the secondary liner is explosively expelled from the case.
3. The method of claim 1 , further comprising deforming the primary liner into an outer portion of the projectile.
4. The method of claim 3 , further comprising exposing a portion of the secondary liner at a posterior end of the projectile.
5. The method of claim 4 , further comprising forming a propulsive jet with the combusting portion of the secondary liner at the exposed portion of the secondary liner at the posterior end of the projectile.
6. The method of claim 3 , further comprising deforming the secondary liner comprising the reactive material into a central portion of the projectile.
7. The method of claim 1 , wherein increasing a velocity of the projectile comprises increasing the velocity of the projectile in excess of a velocity generated by explosively expelling the primary liner and the secondary liner from the case.
8. The method of claim 1 , further comprising explosively expelling a control liner from the case with the primary liner and the secondary liner.
9. The method of claim 8 , further comprising deforming the control liner into a posterior portion of the projectile.
10. The method of claim 9 , further comprising controlling a rate of reaction of an ignited portion of the secondary liner with the control liner.
11. The method of claim 1 , further comprising explosively expelling a buffer liner and an additional liner comprising a reactive material from the case.
12. The method of claim 11 , further comprising:
deforming the buffer liner and the additional liner into a central portion of the projectile; and
at least partially separating the secondary liner and the additional liner with the buffer liner.
13. The method of claim 12 , further comprising igniting the additional liner as the projectile impacts an intended target.
14. The method of claim 1 , wherein increasing a velocity of the projectile comprises:
imparting a first initial velocity to the primary liner and the secondary liner by explosively expelling the primary liner and the secondary liner from the case; and
accelerating the projectile to a second, increased velocity that is at least 10% greater than the first initial velocity.
15. The method of claim 1 , further comprising selecting the primary liner to comprise a copper material.
16. The method of claim 1 , further comprising selecting the reactive material to comprise a metal material selected from at least one of tungsten, zirconium, aluminum, and nickel.
17. The method of claim 16 , further comprising selecting the reactive material to further comprise an oxidizer material selected from at least one of potassium perchlorate, potassium nitrate, ammonium perchlorate, and cupric oxide.
18. A method of forming a projectile, the method comprising:
expelling at least two liners from a case;
deforming a first liner of the at least two liners to at least partially surround a portion of a second liner of the at least two liners to form the projectile, the second liner comprising a material formulated to at least partially combust; and
after expelling the at least two liners from the case:
igniting a portion of the second liner; and
increasing a velocity of the projectile by combusting at least the portion of the second liner within the first liner.
19. A method of deploying a projectile, the method comprising:
deforming a first liner to at least partially surround a portion of a second liner as the first liner and the second liner are expelled from a case to form a projectile;
forming a propulsive jet at a posterior end of the projectile by igniting and combusting at least a portion of the second liner; and
increasing a velocity of the projectile with the propulsive jet.
20. The method of claim 19 , further comprising deforming the second liner comprising a reactive material into a central portion of the projectile.