444results about "Armour plates" patented technology

The invention provides alumina-based gradient ceramic as well as a preparation method and application thereof, and belongs to the technical field of ceramic materials. A gradient structure design is adopted, based on a non-linear component distribution mode, the ratio of aluminum oxide to zirconium oxide is optimized, a sintering aid is added, aluminum oxide-based composite powder is synthesized through high-energy ball milling, a mold is filled with the aluminum oxide-based composite powder in a layered mode according to the gradient design after the aluminum oxide-based composite powder is dried, and the compact aluminum oxide-based gradient ceramic is obtained through a hot pressing sintering process. The alumina-based gradient ceramic prepared by the invention has high Vickers hardness (greater than or equal to 21 GPa), high strength (greater than 850 MPa) and high fracture toughness (greater than 7 MPa.m < 1 / 2 >), and has excellent mechanical properties, and the fracture toughness and the strength are greatly improved on the premise of ensuring that the Vickers hardness is not reduced.

Aerogels comprising a hydrophobic polyimide moiety, including hydrophobic polyimide aerogels, as well as methods of manufacture and applications thereof, are generally described.

The invention discloses a hybrid gradient fiber composite bulletproof laminated plate and a preparation method thereof, and belongs to the technical field of composite target plates. The preparation method comprises the following steps: coating the surface of each aramid fiber cloth laminated layer with waterborne polyurethane, and sequentially performing drying and tailoring forming to obtain a plurality of tailored and formed aramid fiber cloth composite layers; respectively cutting and forming the plurality of ultra-high molecular weight polyethylene fiber non-woven fabric laminated layers; and sequentially carrying out staggered stacking, wrapping, mold embedding and hot press molding on the waterborne polyurethane layers in the multiple tailored and molded ultra-high molecular weight polyethylene fiber non-woven fabric laminated layers and the multiple tailored and molded aramid fiber cloth composite layers, so as to obtain the hybrid gradient fiber composite bulletproof laminated plate. The interface bonding between the aramid fiber cloth and the ultra-high molecular weight polyethylene non-woven cloth in the hybrid gradient fiber composite bulletproof laminated plate is firm, and the hybrid gradient fiber composite bulletproof laminated plate has good energy absorption and blunt impact resistance effects and good bulletproof performance.

The invention provides a transparent bulletproof ceramic composite structure with an electric heating function and a preparation method of the transparent bulletproof ceramic composite structure. The composite structure comprises an anti-splashing layer (1), a first middle layer film (2), a multi-layer stacked structure (3) of glass sheets and films, a first transition layer (4), an electric heating film layer (5), a second transition layer (6), a ceramic layer (7), a first antireflection film layer (8), a second antireflection film layer (9), a third antireflection film layer (10), a second middle layer film (11), an inorganic glass layer (12), a third transition layer (13) and an anti-static layer (14) which are arranged in sequence. The composite structure provided by the invention has excellent impact resistance and bulletproof grade, can effectively resist the damage of high-speed elastic sheets or impact objects, and meets the requirements of high-safety application scenes such as weapon armors, armed airplanes and high-speed trains; and the anti-static film has clear optical observation capability, high transmissivity and anti-static property.

The present disclosure describes articles that may be used in protective gear, including but not limited to body armor, helmets, shields, or barriers. These articles may include a polymeric material coated with nanoparticles, in a single layer or in multiple layers, which are treated to form a composite. The articles may further include a ceramic layer and / or a back-face layer. Such articles may be useful for protecting an object or wearer against projectiles.

The invention relates to the technical field of protection equipment, and discloses a spliced bulletproof plugboard and a preparation method thereof.The spliced bulletproof plugboard comprises a first aramid sheet layer, a ceramic plate layer, a second aramid sheet layer and a polyethylene plate layer which are sequentially arranged in the direction from a bullet facing face to a bullet backing face; the ceramic plate layer comprises a ceramic plate and a long fiber layer circumferentially wrapping the side face of the ceramic plate, and the ceramic plate is formed by bonding and splicing a plurality of ceramic blocks. According to the invention, the plurality of ceramic blocks are bonded and spliced into the ceramic plate, and meanwhile, the circumferential side edge of the ceramic plate is wrapped by the long fiber layer to form circumferential constraint, so that the constraint rigidity between the spliced ceramic blocks can be effectively improved, and further, the ceramic close to a striking point is effectively prevented from shifting or being separated from the adjacent layer; the multiple resistance and the side edge protection performance of the bulletproof inserting plate are improved, and deformation and sinking at the moment of bouncing are reduced.

A personal protective vest assembly is described herein. The personal protective vest assembly includes a personal protective vest and a body armor panel positioned within the personal protective vest. The body armor panel includes a ballistic material panel assembly that includes a plurality of layered material segments defined between a strike face and a wear face. Each of the layered material segments includes a different ballistic material.

An Active Shooter Protection System (ASPS), comprising a variety of gravity-operated mechanisms for deploying one or more ballistic sheets, panels, or blankets of woven ultra-high-strength polymeric fiber (e.g., Kevlar™) directly in front of a door, such as in a school room. The deployment of a ballistic blanket is initiated by pulling down on a pull box, which activates a release that lowers down one or more segments of the ballistic blanket that is stored above a top of a door plate. The ASPS system includes means for securely locking the door shut (in addition to a dead bolt lock). The ballistic panels can include optional ceramic inserts for greater protection from high-power AR-15 rifles.

The invention provides a bulletproof structure and a preparation process thereof. The bulletproof structure comprises a ceramic layer plate, a titanium alloy layer plate, an aramid fiber layer plate, an ultra-high molecular weight polyethylene layer plate and a honeycomb heterogeneous anti-impact layer which are sequentially stacked, the ceramic layer plate and the titanium alloy layer plate, the titanium alloy layer plate and the aramid fiber layer plate, and the aramid fiber layer plate and the ultra-high molecular weight polyethylene layer plate are connected through a large-surface-density polyurethane resin adhesive film; wherein the ceramic laminate is made of nano modified B4C ceramic or nano modified TiB2 ceramic. The impact resistance of the base body can be improved, incoming projectiles are partially eroded and decomposed in the residence stage of the ceramic plate, then a large number of cracks are formed on the surfaces, conical fracture failure is achieved, bullet energy is decomposed greatly, the projectiles are eroded to deform and break, high temperature of combustion of the projectiles is blocked, and the impact resistance of the ceramic plate is improved especially for large-momentum and high-invasion-force projectiles. The invention particularly relates to a 12.7 mm armor-piercing combustion bomb and a kinetic energy warhead below.

The invention relates to the field of high-performance ceramics and bulletproof, in particular to a high-toughness layered boron carbide bulletproof ceramic and a preparation method thereof. The preparation method of the layered boron carbide bulletproof ceramic comprises the following steps: step 1, adding boron carbide powder and a sintering aid into a mixed solvent, then adding a dispersing agent, a binder and a plasticizer, and carrying out mixing and ball milling to obtain ceramic slurry; step 2, preparing the ceramic slurry into a boron carbide ceramic biscuit sheet by adopting a tape casting process; and laminating the boron carbide ceramic biscuit sheets, pressing, and carrying out hot pressed sintering to obtain the layered boron carbide bulletproof ceramic. Through the layered structure design, the controllable preparation of the layered boron carbide bulletproof ceramic is realized, so that the layered boron carbide bulletproof ceramic shows the characteristics of high strength and high toughness under the action force vertical to the layered direction, and the actual application effect of the layered boron carbide bulletproof ceramic is improved. Meanwhile, the layered structure provided by the invention has designability and operability, and the preparation process is simple.

A personal protective vest assembly is described herein. The personal protective vest assembly includes a personal protective vest and a body armor panel positioned within the personal protective vest. The body armor panel includes a ballistic material panel assembly that includes a plurality of layered material segments defined between a strike face and a wear face. Each of the layered material segments includes a different ballistic material.

The invention belongs to the technical field of light high-strength armor plates, and relates to a light high-performance layered composite armor plate and a preparation method thereof. According to the armor plate, the characteristics of good elasticity resistance and excellent corrosion resistance of the 2519A alloy and the advantages of low density, high strength and good heat resistance of the Mg-Gd alloy are combined. By utilizing the beneficial effect of friction stir additive manufacturing on microstructure and interlayer bonding, the prepared composite board has the characteristics of light weight and high performance, and has excellent comprehensive performance. The aging temperature range of the Mg-Gd alloy and the aging temperature range of the 2519A alloy adopted by the plate are high in coincidence, and after the composite plate is manufactured through friction stir additive manufacturing, the comprehensive mechanical property of the plate can be further improved through aging heat treatment.

The invention relates to the technical field of protective materials and preparation thereof, and provides a multi-penetration-resistant ceramic armor array structure and a preparation method thereof.The multi-penetration-resistant ceramic armor array structure comprises a plurality of carbon-ceramic units arranged in an array mode, the space between the multiple carbon-ceramic units is filled with B4C powder in a cold pressing mode, and molten aluminum permeates into the space between the multiple carbon-ceramic units through pressure; the carbon-ceramic unit is formed by stacking pure ceramic layers and sizing carbon fiber cloth with different thicknesses in a gradient mode. The preparation method comprises the steps that S1, the carbon-ceramic unit is designed and prepared; s2, designing and preparing a preform blank; and S3, designing and preparing a ceramic protection array structure. The preparation method has the beneficial effects that the carbon fiber toughened ceramic is used as a main body material, a high-toughened carbon ceramic structure is designed by adopting a gradient array, the toughness-matched ceramic composite material module suitable for projectile impact is prepared by adopting a pressure infiltration integrated forming technology, and the multi-elastic resistance of the ceramic composite material module is improved on the premise that the composite protection weight is not increased.

The present invention belongs to the technical field of composite material preparation, and particularly relates to a high-performance conch shell bionic structure aluminum-based composite armor and a forming method thereof. The forming process is as follows: first, mix powders, then stack and compact the powders to form a fixed combination, solutionize the laminated material of the combination and immediately perform hot rolling, and then perform aging treatment. Deep cryogenic treatment can be carried out after aging; at least one layer in the intermediate layer of the laminated material before rolling is composed of powders, and the high-strength layer is located between metal plates. The high-strength layer is composed of ceramic particles and metal particles evenly mixed. The present invention first attempts to introduce powders between two metal plates. By virtue of the high activity of the powders, solutionizing is carried out first and then rolling, which can improve the diffusion of the powders and achieve better bonding. The strong and tough alternating stacking of the conch shell structure causes cracks to deflect when passing between layers, and will bypass the particles when passing through the particles in the high-strength layer to achieve deflection. This form of multiple reciprocating deflection of cracks can improve the energy absorption rate, thereby improving the impact resistance, and also greatly improving the strength and toughness of the aluminum-based composite armor.

The present invention discloses a heterogeneous metal laminated composite armor and a preparation method thereof, comprising the following steps: A. Prepare different heterogeneous metal elements respectively and stack them along the thickness direction; B. Vacuum package the periphery of the interface of the stacked heterogeneous metal elements; C. Achieve metallurgical bonding of the heterogeneous metal interfaces through stacked forging and heat preservation diffusion treatment; D. Obtain a heterogeneous metal laminated composite armor with specific specifications through forging and precision rolling. The present invention uses a high-strength metal as the face plate and a high-toughness metal as the back plate, and at least one of the two metals is a high specific strength material. Through stacked forging and heat preservation diffusion treatment, strong metallurgical bonding is achieved at the heterogeneous metal interfaces, and combined with subsequent forging and precision rolling processes, a lightweight metal composite armor plate with excellent anti-ballistic performance is prepared, improving the anti-multi-projectile strike ability and comprehensive protection performance of the armor, and solving the problem of weak interfacial bonding strength of heterogeneous materials.

Disclosed are a method, system, and apparatus of a rapidly expandable anti-drone mesh system and method. In one aspect, a system includes a protected asset, an armored mesh on the protected asset, a sensor system to detect a hostile drone to imminently collide with the protected asset in an impact zone, and a responsive mechanism of the protected asset to cause a high-pressure gas to rapidly expand the armored mesh in the impact zone of the protected asset when the sensor system detects the hostile drone to imminently collide with the protected asset. The armored mesh preserves the protected asset by causing the hostile drone to impact the armored mesh instead of directly the protected asset. The protected asset may be a building, a vehicle, a wearer of a tactical gear, a civilian, a soldier, a boat, a tank, a weaponry, an airplane and / or an infrastructure.

The invention provides an alloy and silicon carbide ceramic integrated protective armor structure and a preparation method thereof.The armor structure comprises a ceramic plate framework, long-plate-shaped hole channels distributed regularly are formed in the ceramic plate framework, and the long-plate-shaped hole channels are filled with metal alloy materials formed through pouring; the ceramic plate framework is provided with a metal alloy wrapping layer formed through pouring. During preparation, the ceramic plate framework internally provided with regularly distributed long-plate-shaped hole channels is prepared firstly, then alloy liquid is poured into a mold, the molten alloy liquid is injected into the mold to completely immerse the ceramic plate and fill the long-plate-shaped hole channels in the ceramic plate, and a uniform wrapping layer is formed on the surface of the ceramic plate. According to the structure, alloy and silicon carbide ceramic are effectively combined, reasonable structural design is adopted, high-speed penetrating objects are effectively blocked through the synergistic effect of the high-strength titanium alloy frame and the ceramic plate, and the multiple functions of bulletproof, impact resistance, high temperature resistance, corrosion resistance and the like can be achieved.

Systems can comprise a prime mover and an enclosure. The enclosure can include a body that comprises walls and one or more anti-ballistic materials. The prime mover can be housed in the body of the enclosure. For at least one of the walls of the body of the enclosure, at least one of the anti-ballistic material(s) can be attached to an inner surface of the wall. Each of the anti-ballistic material(s) may be in the form of a woven fabric comprising para-aramid fibers. In some examples, for each of the pumping unit(s), the walls of the enclosure's body include opposing first and second sidewalls; and opposing front and rear walls, each extending from the first sidewall to the second sidewall; wherein for each of the first and second sidewalls and front and rear walls, at least one of the anti-ballistic material(s) is attached to the inner surface of the wall.

The invention provides a composite bulletproof material and a preparation method thereof as well as a composite bulletproof sheet and application thereof, the composite bulletproof material comprises a recrystallized silicon carbide matrix and a composite material which is filled in internal pores of the recrystallized silicon carbide matrix and covers the surface of the recrystallized silicon carbide matrix, the composite material comprises cured resin and silicon carbide particles. According to the composite bulletproof material provided by the invention, the surface of the recrystallized silicon carbide matrix is covered with the composite material, and the internal pores of the recrystallized silicon carbide matrix are filled with the composite material, so that the porosity of the composite bulletproof material is reduced, and the bending resistance, fracture toughness and corrosion resistance of the composite bulletproof material are improved.

To provide a molded composite body capable of being used as a bulletproof material against tungsten carbide bullets.SOLUTION: A molded composite body of a silicon-infiltrated reaction-bonded mixed ceramic material has a microstructure defined by: primary grains (1) of crystalline boron carbide (B4C) having an average particle diameter of 500 μm>d50>100 μm and a composition greater than 10 wt.% and less than 50 wt.%; and primary grains of fine silicon carbide having d50<70 μm and a composition greater than 10 wt.% and less than 50 wt.%. The primary grains of crystalline boron carbide are bonded by silicification treatment (3) within a silicon carbide matrix having a free metallic silicon (2) in an amount greater than 1 wt.% and less than 20 wt.%, thereby constituting byproduct silicon carbide formed in an amount greater than 5 wt.% and less than 25 wt.%.SELECTED DRAWING: Figure 1

Generally, the present invention relates to a method for improving the properties of a welded structure as well as the resulting improved welded structure. The weld joint is often the weakest part of welded structures. Especially, the coarse-grained area is usually the most critical zone in terms of the welded structure's properties, as its large grain size leads to a brittle microstructure. The present invention provides a method for improving the properties of a welded structure comprising at least steps of welding together a number of parts of the welded structure, and applying a heat treatment for the welded structure.

A flexible armour panel, comprising: a fibre pack (310, 330) comprising a first plurality of layers of a fibre reinforced polymer matrix; and a scale pack (300) overlapping the fibre pack (310, 330). The scale pack (300) comprises a plurality of articulating imbricated rigid scales (100). Each scale of the plurality of articulating imbricated scales (100) is coupled directly to at least one adjacent scale of the plurality of articulating imbricated scales (100).

Lightweight ballistic glasses are provided that provide effective protection from ballistic attack while also being lightweight enough for use in armored vehicles and aircraft. In addition to other embodiments, a multilayered lightweight ballistic glass is provided that meets the CEN 1063 Level BR7 standard while having a weight of no greater than about 155 kilograms per square meter (kg / m2), and a total thickness of less than about 75 mm.

The utility model relates to the technical field of bulletproof plates, in particular to an elastic constraint composite bulletproof plate which comprises a baffle, a buffer plate is arranged on the outer side of the baffle, the buffer plate is made of foamed aluminum, and a dispersing assembly is arranged on the outer side of the baffle. The dispersing assembly comprises a plurality of stacked ceramic frames, the ceramic frames are honeycomb-shaped, a plurality of ceramic trapezoidal frames are fixedly connected to the outer sides of the ceramic frames, and the ceramic frames and the ceramic trapezoidal frames are all made of silicon carbide ceramics. The honeycomb-shaped ceramic frame and the ceramic trapezoid frame are arranged in a matched mode, a plurality of gaps are formed in the honeycomb-shaped structure, the actual usage amount of ceramic materials is reduced through the gaps, the number of protective layers is increased due to the fact that the honeycomb-shaped ceramic pieces exist, and after the body armor is hit by bullets once, even if the honeycomb-shaped ceramic pieces are broken in a local area, the protective layers can not be damaged. Due to the mutual connectivity and the overall stability of the honeycomb structure, the surrounding honeycomb units can still play a protection role continuously.

To provide a protective article which is easy to produce, has excellent blade-proof performance, has few gaps and easily follows the body.SOLUTION: An edgeproof material made by connecting a series of metal pieces with tape-like fabric sandwiched therebetween on both sides. The size of the metal pieces is 0.25 cm2 or more and less than 4 cm2, with all sides being 2 cm or less. The gap between adjacent metal pieces is 0.1 mm or more and less than 1 mm, and the thickness of the metal pieces is 2 mm or more and less than 4 mm.SELECTED DRAWING: Figure 1

A composite structure comprises a plurality of first layers each comprising graphene; and a plurality of second layers each comprising an aerogel, wherein the first and second layers alternate in the composite structure. A method for manufacturing a composite structure comprising first and second layers comprises providing a plurality of the second layers, each second layer comprising an aerogel, providing a plurality of first layers, each layer comprising graphene; and arranging the first and second layers so that the layers form a composite structure in which the plurality of first and second layers alternate.

A hybrid armour cassette comprising: a first plate; a second plate; and an interlayer having a plurality of layers sandwiched between the first and second plates; wherein the plurality of layers comprises at least one passive layer comprising a passive material and at least one reactive layer comprising a reactive material.

The invention belongs to the technical field of composite material preparation, and particularly relates to TiB2-based composite ceramic as well as a preparation method and application thereof. The preparation method comprises the following steps: respectively grinding a surface layer raw material, a transition layer raw material and a core layer raw material to respectively obtain surface layer raw material mixed powder, transition layer raw material mixed powder and core layer raw material mixed powder; the surface layer raw material mixed powder, the transition layer raw material mixed powder and the core layer raw material mixed powder are laid according to the structure of the ceramic assembly, and the ceramic assembly is obtained; carrying out compression molding on the ceramic assembly to obtain a ceramic green body; performing spark plasma sintering on the ceramic body to obtain a ceramic semi-finished product; and sintering the ceramic semi-finished product at high temperature and high pressure to obtain the TiB2-based composite ceramic. The TiB2-based composite ceramic prepared by the preparation method provided by the invention is high in density, high in hardness, good in toughness and excellent in comprehensive performance.