Layered energetic material having multiple ignition points
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F42B-003/10
F42C-011/06
C06B-045/14
F42B-003/195
출원번호
US-0213750
(2014-03-14)
등록번호
US-9464874
(2016-10-11)
발명자
/ 주소
Mohler, Timothy
Mohler, Jonathan
Coffey, Kevin R.
출원인 / 주소
SPECTRE MATERIALS SCIENCES, INC.
대리인 / 주소
Lang, IV, William F.
인용정보
피인용 횟수 :
4인용 특허 :
13
초록▼
An energetic material having thin, alternating layers of metal oxide and reducing metal is provided. The energetic material may be provided in the form of a sheet, foil, cylinder, or other convenient structure. A method of making the energetic material resists the formation of oxide on the surface o
An energetic material having thin, alternating layers of metal oxide and reducing metal is provided. The energetic material may be provided in the form of a sheet, foil, cylinder, or other convenient structure. A method of making the energetic material resists the formation of oxide on the surface of the reducing metal, allowing the use of multiple thin layers of metal oxide and reducing metal for maximum contact between the reactants, without significant lost volume due to oxide formation. An ignition system for the energetic material includes multiple ignition points, as well as a means for controlling the timing and sequence of activation of the individual ignition points. The combination of the energetic material and ignition system provides a means of charge and blast shaping, ignition timing, pressure curve control and maximization, and safe neutralization of the energetic material.
대표청구항▼
1. In combination, an energetic material and an ignition system, comprising: a metal oxide layer having a first thickness, the first thickness being between about 5 am and about 1,000 nm;a reducing metal layer having a second thickness, the second thickness being between about 5 nm and about 1,000 n
1. In combination, an energetic material and an ignition system, comprising: a metal oxide layer having a first thickness, the first thickness being between about 5 am and about 1,000 nm;a reducing metal layer having a second thickness, the second thickness being between about 5 nm and about 1,000 nm;an interface between the metal oxide layer and reducing metal layer, the interface being either substantially free of reducing metal oxide, or the interface being a reducing metal oxide layer having an average thickness of less than 2 nm; andthe combination being of unitary construction with the ignition system forming a layer of the combination, the layer having a plurality of ignition signal conductors therewithin, the ignition system further having an ignition point corresponding to each ignition signal conductor, the ignition system being structured to provide an ignition signal to each ignition point at a predetermined time and with a predetermined sequence with respect to ignition signals provided to other ignition points. 2. The combination according to claim 1, wherein each ignition signal conductor is a fuse operatively connected to at least one of the ignition points, each fuse having a length that is proportional to a predetermined time interval between an original ignition signal and a desired ignition signal at each ignition point. 3. The combination according to claim 1: further comprising a counting circuit, the counting circuit having a plurality of output bits; andwherein each ignition point is operatively connected to either an output bit or a at least one logical gate, with the logical gate being operatively connected to a combination of output bits, the output bit or combination of output bits corresponding to a predetermined time interval between an initial ignition signal and ignition of each ignition point. 4. The combination according to claim 1, further comprising a microprocessor, the microprocessor having an output pin operatively connected to each ignition point, the microprocessor being programmable to provide an ignition signal to each ignition point with a predetermined timing and sequence. 5. The combination according to claim 4, wherein the microprocessor is user-programmable. 6. The combination according to claim 1, wherein the ignition system is structured to activate the ignition points in a sequence that utilizes a blast from earlier ignition points to shape a blast from later ignition points. 7. The combination according to claim 1, wherein: the energetic material is generally cylindrical in shape, and is formed from a plurality of nested layers of reducing metal and metal oxide;the ignition system that is structured to activate ignition points in a sequence beginning with an exterior of the energetic material, with ignition progressing to ignition points disposed in increasing proximity to a central portion the composite material; andthe ignition system being further structured to activate the ignition points in a timed relationship with each other, the timed relationship being predetermined to produce a series of pressure waves from all layers that reaches a predetermined point essentially simultaneously. 8. The combination according to claim 1: further comprising a pressure vessel containing the energetic material, the pressure vessel being capable of withstanding a maximum safe internal pressure; andwherein the ignition system is structured to activate the ignition points with a time delay between successive ignition point activations that is structured to produce a pressure curve that quickly rises to a pressure curve maximum, and then substantially maintains the pressure curve maximum without exceeding the maximum safe internal pressure. 9. The combination according to claim 8, further comprising means for activating the ignition points with sufficient time delay between successive activations to destroy the energetic material without rupturing the pressure vessel. 10. The combination according to claim 1, wherein the energetic material forms a detonator for another ignitable or explosive material. 11. The combination according to claim 10, wherein the ignitable or explosive material forms at least one layer adjacent to at least one layer of the energetic material. 12. The combination according to claim 11, wherein the ignition system is structured to activate the ignition points with a timing and sequence of activations that is structured to deliver pressure waves resulting from all ignition points to a predetermined location at essentially the same time. 13. The combination according to claim 12, wherein: the energetic material is generally cylindrical in shape, and is formed from a plurality of concentric layers of reducing metal and metal oxide alternating with a plurality of concentric gaps;the ignition system that is structured to activate ignition points in a sequence beginning with an exterior of the energetic material, with ignition progressing to ignition points disposed in increasing proximity to a central portion the composite material; andthe ignition system being further structured to activate the ignition points in a timed relationship with each other, the timed relationship being predetermined to produce a series of pressure waves from all layers that reaches a predetermined point essentially simultaneously. 14. The combination according to claim 10, wherein the ignition system is structured to deliver ignition signals to all ignition points within a small time interval. 15. The combination according to claim 14, wherein the ignition system is structured to deliver ignition signals to all ignition points at essentially the same time. 16. The combination according to claim 14, wherein the ignition system comprises: a first group of first fuses, each first fuse defining an initiation end, a terminal end, and a length defined therebetween, each first fuse having a different length than the other first fuses;a second group of second fuses, each second fuse defining an initiation end, a terminal end, and a length defined therebetween, each second fuse having a different length than the other second fuses, the initiation end of each second fuse being operatively connected to the terminal end of one of the first fuses;the length of each first fuse and each second fuse being structured to cause ignition signals originating at each of the initiation ends of the first fuses to reach the termination ends of the second fuses at essentially the same time. 17. The combination according to claim 16, further comprising an ignition signal initiator operatively connected to the initiation end of each first fuse, whereby activating the ignition signal initiator initiates an ignition signal within all first fuses at essentially the same time. 18. The combination according to claim 17, wherein one of the first fuses surrounds the ignition signal initiator. 19. The combination according to claim 17, wherein the ignition signal initiator is a primer. 20. The combination according to claim 14, wherein: the energetic material forms a detonator for an explosive of a munition, andthe munition is structured to deflagrate upon less than all ignition points being activated within the small time interval. 21. The combination according to claim 20, wherein the munition is structured to deflagrate upon only one ignition point being activated within the small time interval.
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