Al/PTFE-containing microchip exploding foil exploder and manufacturing method thereof
A technology of PTFE and detonators, which is applied in blasting barrels, offensive equipment, weapon accessories, etc., can solve the problems of low precision, reduce the ignition energy of McEFI, and high production costs, and achieve the effects of high integration, low production costs, and small volume
Inactive Publication Date: 2019-02-01
NANJING UNIV OF SCI & TECH
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[0003] Exploding foil initiator (Exploding Foil Initiator, EFI) is also called shock foil detonator. It is usually composed of substrate, explosive bridge foil, flyer layer, accelerating chamber and agent. It is an extremely safe and reliable ignition and detonation device. Traditional EFI, each component is manually aligned and installed, resulting in low precision and high manufacturing cost. Using Micro Electro Mechanical System (MEMS) technology, integrated batch preparation of McEFI has become a new research trend
[0004] However, the ignition (ignition or detonation) energy of the current McEFI is relatively high, and the energy provided by the weapon system (such as solid rocket motor or missile fuze, etc.) is extremely limited, so how to reduce the ignition energy of McEFI, based on McEFI Preparation of Low Energy Exploding Foil Initiator (LEEFI) has become a current and future research hotspot
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[0048] In this implementation case, an ignition circuit is designed on the basis of preparing McEFI, combined with image 3 and Figure 4 , including the following steps (Note: image 3 The left and right figures in the figure are the front view and top view of the preparation process respectively):
[0049] first step, see image 3 (a) and (a'), for 50.8mm (length) × 50.8mm (width) × 0.635mm (height) Al 2 o 3 The surface of the ceramic substrate 1 is cleaned.
[0050] The second step, see image 3 (b) and (b′), using magnetron sputtering and wet etching process on Al 2 o 3 An Al metal layer is deposited on the surface of the ceramic substrate 1 to form pads 21 , transition regions 22 and metal bridge foils 23 . Relevant dimensions are: the width of pad 21 is 5mm-10mm; the distance from metal bridge foil 23 to pad 21 is 5mm-6mm; the size of bridge foil is 0.4mm (length)×0.4mm (width)×3.6μm (height); The disc 21 is connected to the middle of the metal layer by a transi...
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Abstract
The invention relates to the technical field of micro low-energy ignition and exploding, in particular to an Al / PTFE-containing microchip exploding foil exploder and a manufacturing method thereof. The exploder comprises a base plate, an Al / PTFE double-layer composite energy-containing film layer which is arranged on the base plate, and comprises an Al metal layer and a PTFE layer, a polymer flying sheet layer which is arranged on the Al / PTFE double-layer composite energy-containing film layer, an accelerating chamber and a reagent which is arranged above the accelerating chamber, wherein theAl metal layer is arranged on the base plate, and comprises a welding disc, a transition region and an Al bridge foil; and the PTFE layer is arranged on the Al metal layer. A great deal of steam and plasma is generated by chemical combustion reaction between Al and PTFE, so that bridge foil shearing ability and ability of driving a flying sheet are strengthened, and detonating energy of the microchip exploding foil exploder is finally reduced. A micro electromechanical system process is adopted to manufacture the microchip exploding foil exploder, so that batch production can be realized, andmanufacturing cost is reduced; and moreover, the obtained exploder is high in integration, and is small in size.
Description
technical field [0001] The invention relates to the technical field of miniature low-energy ignition and detonation, in particular to an Al / PTFE-containing microchip explosion foil detonator and a preparation method thereof. Background technique [0002] Low-energy ignition and detonation is the development trend of ignition and detonation in weapon systems. [0003] Exploding foil initiator (Exploding Foil Initiator, EFI) is also called shock foil detonator. It is usually composed of substrate, explosive bridge foil, flyer layer, accelerating chamber and agent. It is an extremely safe and reliable ignition and detonation device. Traditional For EFI, each component is manually aligned and installed, resulting in low precision and high manufacturing cost. Using Micro Electro Mechanical System (MEMS) technology, integrated batch preparation of McEFI has become a new research trend. [0004] However, the ignition (ignition or detonation) energy of the current McEFI is relative...
Claims
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IPC IPC(8): F42B3/12F42B3/198
CPCF42B3/12F42B3/198
Inventor 朱朋杨智覃新徐聪张秋汪柯沈瑞琪
Owner NANJING UNIV OF SCI & TECH
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