CN115289909A - Bulletproof plate for armored vehicle and preparation method thereof - Google Patents
Bulletproof plate for armored vehicle and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000010410 layer Substances 0.000 claims abstract description 192
- 239000000919 ceramic Substances 0.000 claims abstract description 105
- 229920002396 Polyurea Polymers 0.000 claims abstract description 103
- 239000004744 fabric Substances 0.000 claims abstract description 65
- 238000010521 absorption reaction Methods 0.000 claims abstract description 55
- 239000011248 coating agent Substances 0.000 claims abstract description 48
- 238000000576 coating method Methods 0.000 claims abstract description 48
- 239000011247 coating layer Substances 0.000 claims abstract description 17
- 229920006253 high performance fiber Polymers 0.000 claims abstract description 13
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 238000013329 compounding Methods 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims description 33
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 26
- 239000004917 carbon fiber Substances 0.000 claims description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 26
- 239000000835 fiber Substances 0.000 claims description 21
- 229920006231 aramid fiber Polymers 0.000 claims description 10
- 239000007822 coupling agent Substances 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000005253 cladding Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 5
- 230000035939 shock Effects 0.000 abstract description 4
- 230000035515 penetration Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 15
- 239000003292 glue Substances 0.000 description 15
- 229920002635 polyurethane Polymers 0.000 description 15
- 239000004814 polyurethane Substances 0.000 description 15
- 239000004760 aramid Substances 0.000 description 9
- 229920003235 aromatic polyamide Polymers 0.000 description 9
- 239000000463 material Substances 0.000 description 6
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- 239000003063 flame retardant Substances 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 4
- 230000008685 targeting Effects 0.000 description 4
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 238000005187 foaming Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/023—Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0414—Layered armour containing ceramic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0471—Layered armour containing fibre- or fabric-reinforced layers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the technical field of composite materials, and particularly relates to a bulletproof plate for an armored vehicle and a preparation method thereof, wherein the bulletproof plate comprises an outer coating layer, a bulletproof ceramic layer and an energy absorption layer, the bulletproof ceramic layer and the energy absorption layer are bonded and fixed through a thermosetting adhesive, the outer coating layer is formed by coating polyurea on the outer surfaces of the bulletproof ceramic layer and the energy absorption layer, and the bulletproof ceramic layer is formed by splicing bulletproof ceramic blocks; the energy absorption layer is formed by alternately laying and compounding high-performance fiber fabrics and polyurea layers, the high-performance fiber fabrics disperse and absorb the impact energy of the projectile with high strength and high modulus, and the polyurea exerts the superelasticity to consume a large amount of energy to weaken the shock wave and improve the penetration resistance of the bulletproof plate; the bulletproof plate is light in weight, thin in thickness and excellent in multi-shot elasticity resistance, and greatly improves the maneuverability and the bearing capacity of the armored vehicle.
Description
Technical Field
The invention belongs to the technical field of composite materials, relates to an armor protection material, and particularly relates to a bulletproof plate for an armored vehicle and a preparation method thereof.
Background
At present, with the introduction and the gradual clarification of the concept of "multi-domain warfare", the research on the protective performance of armored vehicles is developing towards functionalization, light weight and toughening. The increase in thickness and weight of armor to improve its protective properties can severely reduce the maneuvering characteristics of armored vehicles, and in addition, ceramic, composite and metal protective structures have reached performance limits, making further weight reduction difficult to achieve. Therefore, there is a great need to introduce advanced materials to design a bulletproof armor panel that is light in weight and strong in bulletproof capability.
The energy absorbing layer is introduced into the bulletproof armor plate to absorb the residual kinetic energy of the bullet, and is mostly prepared from soft foaming materials such as polyurethane, EVA, polyvinyl chloride and the like, and the materials have low compressive strength, are easy to deform and have limited kinetic energy absorbing capacity. The application of advanced elastomer materials such as polyurea and polyurethane becomes a research hotspot in recent years, the polyurea generates glass transition in the shock resistance process and consumes a large amount of energy, and research shows that the polyurea has the elongation of about 94 percent and the tensile strength of about 13MPa, the polyurea can play the energy consumption advantage as an energy absorption layer, but the strength of the polyurea is lower.
Patent CN 111220027A introduces a lining bulletproof armor plate for armored vehicles and a production process thereof, wherein the bulletproof armor plate comprises a polyurea coating, a buffer layer and a bulletproof layer, the polyurea coating is uniformly coated on the outer sides of the buffer layer and the bulletproof layer, and the bulletproof layer is a bulletproof plate formed by sequentially and alternately superposing a plurality of layers of aramid fabrics, aramid unidirectional cloth and aramid orthogonal cloth and then pressing; the buffer layer is made of soft foaming materials such as polyurethane, EVA (ethylene vinyl acetate), polyvinyl chloride and the like; the polyurea in the patent and the protection substrate form the bulletproof armor in the form of an adhesive coating independently, and the lining bulletproof armor plate provided by the patent is mainly used for a ceiling, a side wall and the like in an armored vehicle and one side of the body of a person in the vehicle to contact, so that the safety of equipment and the person in the vehicle is protected.
The application of high performance fiber reinforced polyurea composite structures to protective armor has not been reported.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a bulletproof plate for an armored vehicle and a preparation method thereof.
The purpose of the invention is realized as follows: a bulletproof plate for armored vehicles comprises an outer cladding layer, a bulletproof ceramic layer and an energy absorption layer, wherein the bulletproof ceramic layer and the energy absorption layer are bonded and fixed through thermosetting adhesives, the bulletproof ceramic layer serves as a bullet-facing surface and is formed by splicing bulletproof ceramic blocks, the bulletproof ceramic layer is passivated and crushed by high hardness and high strength of the bulletproof ceramic layer, and the bullet speed is obviously reduced; the energy absorption layer is formed by alternately laying and compounding high-performance fiber fabrics and polyurea layers, polyurea is adopted as a matrix, the polyurea matrix is used for bonding the high-performance fibers together and transmitting stress to the high-performance fibers, the high-performance fibers are dispersed and absorb shot impact energy with high strength and high modulus by utilizing the characteristics of compression resistance and shear resistance, and the polyurea exerts superelasticity to consume a large amount of energy to weaken shock waves; the outer coating is formed by coating polyurea, so that the boundary of the bulletproof plate is restrained, and the multi-elasticity resistance of the bulletproof plate is improved.
The invention adopts the following specific technical scheme:
a bulletproof plate for an armored vehicle comprises an outer coating layer, a bulletproof ceramic layer and an energy absorption layer, wherein the bulletproof ceramic layer and the energy absorption layer are bonded and fixed through thermosetting glue; the energy absorption layer is formed by alternately laying and compounding high-performance fiber fabrics and polyurea layers, and the thickness of the bulletproof ceramic layer is 7-12 mm; the thickness of the energy absorbing layer is 12-17 mm, and the thickness of the outer cladding layer is 0.5-1.0 mm.
Furthermore, the thickness of the single layer of the polyurea layer is 0.3 mm-0.5 mm.
Further, the high-performance fiber fabric is one of a carbon fiber fabric and an aramid fiber fabric or a mixed system thereof.
Further, the bulletproof ceramic block is B 4 C. One of TBC ceramics.
Preferably, the side length of the bulletproof ceramic block is 25-50 mm.
A preparation method of a bulletproof plate for an armored vehicle comprises the steps of preparing a bulletproof ceramic layer, preparing an energy absorption layer and coating a polyurea coating, and comprises the following specific steps:
1) Preparing a bulletproof ceramic layer: seamlessly splicing the bulletproof ceramic blocks to form a bulletproof ceramic layer for later use according to the size of the needed bulletproof ceramic layer;
2) Preparing an energy absorption layer: cutting a fiber fabric with the same size as the external contour of the bulletproof ceramic layer, and spraying a Qtech-113 coupling agent on the cut fiber fabric for pretreatment so as to improve the bonding strength of the fiber fabric and polyurea; coating thermosetting adhesive on one surface of the bulletproof ceramic layer, then laying a layer of fiber fabric, spraying a layer of polyurea on the fiber fabric, laying a layer of fiber fabric, spraying a layer of polyurea, and alternately laying the fiber fabric and the polyurea in this order until the required thickness is reached to obtain an energy absorption layer;
3) Coating a polyurea coating: and (3) uniformly spraying polyurea on the outer surface of the product prepared in the step 2) to form an outer coating layer, and drying the outer coating layer in an oven to obtain the bulletproof plate.
Further, the polyurea used in the step 2) is PUA-600 polyurea or HPUA-601 polyurea.
The polyurea used in the step 3) is SPUA-301 polyurea or PUA-101 polyurea.
Further, the temperature of the oven in the step 3) is 60-80 ℃, and the temperature is kept for 6-10 h.
The beneficial effects of the invention are:
1) The armor provided by the invention uses the high-performance fiber reinforced polyurea composite material as the energy absorption layer, the high-performance fiber disperses and absorbs the impact energy of the projectile with high strength and high modulus, and the polyurea exerts the super elasticity to consume a large amount of energy to weaken the shock wave, thereby improving the penetration resistance of the armor.
2) The outer coating layer adopted by the invention has a flame retardant effect, and can restrict the boundary of the bulletproof plate and improve the multiple bullet resistance of the bulletproof plate.
3) The density of the bulletproof plate surface of the invention can be lower than 40kg/m 2 The thickness can reach 21mm, the weight reduction and the thickness reduction of the bulletproof plate are effectively realized, and the maneuverability and the bearing capacity of the armored vehicle are improved.
4) The bulletproof plate can be arranged in a cabin to protect equipment and personnel safety in a vehicle, can also be used as additional armor for the outside of the vehicle, and can effectively protect 53-type 7.62 mm armor-piercing combustion bullets (bullet speed V) at a short distance after being combined with a matrix armor structure at the corresponding part of a device vehicle body 25 ＝(800～815)m/s)。
Drawings
FIG. 1 is a schematic structural view of a bulletproof plate for an armored vehicle according to the present invention
Wherein: 1-external cladding, 2-bulletproof ceramic layer, 3-energy absorbing layer
Detailed Description
The invention will now be further described with reference to the accompanying drawings and specific examples, which are given by way of illustration and not limitation.
Example one
As shown in fig. 1, the bulletproof plate for armored vehicles comprises an outer coating layer 1, a bulletproof ceramic layer 2 and an energy absorption layer 3, wherein the bulletproof ceramic layer 2 and the energy absorption layer 3 are bonded and fixed through polyurethane glue, the outer coating layer 1 is uniformly coated on the surface of the bulletproof plate by polyurea SPUA-301, and the thickness of the bulletproof plate is 0.5mm; the thickness of the bulletproof ceramic layer is 8mm, and the thickness of the energy absorption layer is 14mm.
A bulletproof plate for an armored vehicle and a preparation method thereof comprise the following steps:
1) Preparing a bulletproof ceramic layer: a regular hexagon B with the side length of 30mm and the thickness of 8mm 4 C ceramic blocks are spliced into a bulletproof ceramic layer of 500mm multiplied by 8mm, B 4 The Vickers hardness of the C ceramic block is 27GPa, and the density is 2.50g/cm 3 For standby;
2) Preparing an energy absorption layer: cutting T800 carbon fiber fabrics with the surface sizes of 500mm multiplied by 500mm, spraying Qtech-113 coupling agent on the T800 carbon fiber fabrics for pretreatment, and coating 540 polyurethane glue on one surface of the bulletproof ceramic layer finished in the step 1); then laying a layer of T800 carbon fiber fabric; spraying a layer of PUA-600 polyurea with the thickness of 0.4mm on the T800 carbon fiber fabric, then laying a layer of T800 carbon fiber fabric, then spraying a layer of PUA-600 polyurea with the thickness of 0.4mm, and alternately laying the T800 carbon fiber fabric and the PUA-600 polyurea in this order to form an energy absorption layer with the thickness of 14mm.
3) Coating a polyurea coating: uniformly spraying SPUA-301 polyurea on the outer surface of the product prepared in the step 2) to form a flame-retardant polyurea coating with the thickness of 0.5mm, and preserving the heat for 8 hours at the temperature of 70 ℃ in an oven to prepare the bulletproof plate.
In the embodiment, the bulletproof ceramic layer is used as a panel on the bullet-facing side of the bulletproof plate, and the bulletproof plate has 53-type 7.62 mm armor-piercing combustion bullet protection capability according to GJB 59.18-88 standard through a target test; the total thickness of the bulletproof plate is only 23mm, and the surface density is 39.8kg/m 2 Compared with the traditional armor plate for protecting 7.62 mm armor-piercing combustion bomb (the thickness is about 26mm, and the areal density is about 50 kg/m) 2 ) Light weight and thin.
The test results are shown in Table 1.
Table 1 target practice test results for the armor of this example
| Bullet order | Bullet type | Angle of incidence | Distance between shots | Initial spring rate | Results of |
| 1 | 7.62mm | 0° | 10m | 810.8m/s | Without |
| 2 | 7.62mm | 0° | 10m | 813.7m/s | Without |
| 3 | 7.62mm | 0° | 10m | 809.1m/s | Without perforation |
Example two
As shown in fig. 1, the armor for armored vehicles comprises a polyurea coating 1, a bulletproof ceramic layer 2 and an energy absorption layer 3, wherein the bulletproof ceramic layer 2 and the energy absorption layer 3 are bonded and fixed through polyurethane glue, and an outer coating layer 1 is uniformly coated on the surface of the armor by polyurea SPUA-301 and has the thickness of 0.5mm; the thickness of the bulletproof ceramic layer is 7mm, and the thickness of the energy absorption layer is 13mm.
The preparation method of the bulletproof plate for the armored vehicle comprises the following steps:
1) Preparing a bulletproof ceramic layer: splicing a square TBC ceramic block with the side length of 25mm and the thickness of 7mm into a bulletproof ceramic layer with the thickness of 500mm multiplied by 7mm, wherein the Vickers hardness of the TBC ceramic block is 22GPa, and the density is 3.20g/cm 3 And is ready for use;
2) Preparing an energy absorption layer: aramid fiber III fiber fabric with the cut surface size of 500mm multiplied by 500mm is sprayed with Qtech-113 coupling agent for pretreatment, and TS230 thermosetting glue is coated on one surface of the bulletproof ceramic layer completed in the step 1); then laying a layer of aramid III fiber fabric; spraying a layer of 0.5mm HPUA-601 polyurea on the aramid III fiber fabric, then laying a layer of aramid III fiber fabric, spraying a layer of 0.5mm HPUA-601 polyurea, and alternately laying the aramid III fiber fabric and the HPUA-601 polyurea in this order to form an energy absorption layer with the thickness of 13mm.
3) Coating a polyurea coating: and (3) uniformly spraying SPUA-301 polyurea on the outer surface of the product prepared in the step 2) to form a flame-retardant polyurea coating with the thickness of 0.5mm, and preserving heat for 10 hours at the temperature of 60 ℃ in an oven to prepare the bulletproof plate.
In the embodiment, the bulletproof ceramic layer is used as a panel on the bullet-facing side of the bulletproof plate, and the bulletproof plate has 53-type 7.62 mm armor-piercing combustion bullet protection capability according to GJB 59.18-88 standard through a target test; the total thickness of the bulletproof plate is only 21mm, and the surface density is 39.7kg/m 2 Compared with the traditional armor plate for protecting a 7.62 mm armor-piercing combustion bomb (the thickness is about 26mm, and the areal density is about 50 kg/m) 2 ) Light weight and thin.
The test results are shown in Table 2.
Table 2 results of the target practice test of the bulletproof plate of the present embodiment
| Bullet order | Bullet type | Angle of incidence | Distance of shooting | Initial spring rate | Results of |
| 1 | 7.62mm | 0° | 10m | 812.5m/s | Without |
| 2 | 7.62mm | 0° | 10m | 814.3m/s | Without |
| 3 | 7.62mm | 0° | 10m | 811.4m/s | Without perforations |
EXAMPLE III
As shown in fig. 1, the bulletproof plate for an armored vehicle comprises a polyurea coating 1, a bulletproof ceramic layer 2 and an energy absorption layer 3, wherein the bulletproof ceramic layer 2 and the energy absorption layer 3 are bonded and fixed through polyurethane glue, and the outer coating layer 1 is uniformly coated on the surface of the bulletproof plate by adopting polyurea PUA-101 and has the thickness of 0.8mm; the thickness of the bulletproof ceramic layer is 8mm, and the thickness of the energy absorption layer is 14mm.
The preparation method of the bulletproof plate for the armored vehicle comprises the following steps:
1) Preparing a bulletproof ceramic layer: splicing regular hexagon TBC ceramic blocks with the side length of 40mm and the thickness of 8mm into bulletproof ceramic layers with the thickness of 500mm multiplied by 8mm, wherein the Vickers hardness of the TBC ceramic is 27GPa, and the density is 3.3g/cm 3 And is ready for use;
2) Preparing an energy absorption layer: aramid fiber III fabric and T800 carbon fiber fabric with cut surface sizes of 500mm multiplied by 500mm are sprayed with Qtech-113 coupling agent for pretreatment, and 540 polyurethane glue is coated on one surface of the bulletproof ceramic layer finished in the step 1); laying a layer of aramid fiber III fabric; spraying a layer of 0.5mm PUA-600 polyurea on the aramid fiber III fabric, then laying a layer of T800 carbon fiber fabric, spraying a layer of 0.5mm PUA-600 polyurea on the aramid fiber III fabric, and alternately laying the aramid fiber III fabric, the T800 carbon fiber fabric and the PUA-600 polyurea in sequence to form an energy-absorbing layer with the thickness of 12mm.
3) Coating a polyurea coating: uniformly spraying PUA-101 polyurea on the outer surface of the product prepared in the step 2) to form a polyurea coating with the thickness of 0.8mm, and preserving heat for 6 hours at 80 ℃ in an oven to prepare the bulletproof plate.
In the embodiment, the bulletproof ceramic layer is used as a panel on the bullet-facing side of the bulletproof plate, and the bulletproof plate has 53-type 7.62 mm armor-piercing combustion bullet protection capability according to GJB 59.18-88 standard through a targeting test; the total thickness of the bulletproof plate is only 21.6mm, and the surface density is 41.8kg/m 2 Compared with the traditional armor plate for protecting a 7.62 mm armor-piercing combustion bomb (the thickness is about 26mm, and the areal density is about 50 kg/m) 2 ) Light weight and thin.
The test results are shown in Table 3.
TABLE 3 result of the target practice of the bulletproof plate of the present embodiment
| Bullet sequence | Bullet type | Incident angle | Distance between shots | Initial spring rate | Results of |
| 1 | 7.62mm | 0° | 10m | 805.5m/s | Without |
| 2 | 7.62mm | 0° | 10m | 808.3m/s | Without |
| 3 | 7.62mm | 0° | 10m | 809.4m/s | Without perforation |
Example four
As shown in fig. 1, the armor for armored vehicles comprises a polyurea coating 1, a bulletproof ceramic layer 2 and an energy absorption layer 3, wherein the bulletproof ceramic layer 2 and the energy absorption layer 3 are bonded and fixed through polyurethane glue, and an outer coating layer 1 is uniformly coated on the surface of the armor by adopting polyurea PUA-101 and has the thickness of 1mm; the thickness of the bulletproof ceramic layer is 7mm, and the thickness of the energy absorption layer is 15mm.
1) Preparing a bulletproof ceramic layer: a regular hexagon B with the side length of 50mm and the thickness of 7mm 4 C ceramic blocks are spliced into a bulletproof ceramic layer of 500mm multiplied by 7mm, B 4 The Vickers hardness of the C ceramic is 28GPa, and the density is 2.53g/cm 3 For standby;
2) Preparing an energy absorption layer: cutting T800 carbon fiber fabrics with the surface size of 500mm multiplied by 500mm, spraying Qtech-113 coupling agent on the T800 carbon fiber fabrics for pretreatment, and coating 540 polyurethane glue on one surface of the bulletproof ceramic layer finished in the step 1); then laying a layer of T800 carbon fiber fabric; and spraying a layer of PUA-600 polyurea with the thickness of 0.3mm, laying a layer of T800 carbon fiber fabric, spraying a layer of PUA-600 polyurea with the thickness of 0.3mm, and alternately laying the T800 carbon fiber fabric and the PUA-600 polyurea in such a way to form an energy absorption layer with the thickness of 15mm.
3) Coating a polyurea coating: and (3) uniformly spraying PUA-101 polyurea on the outer surface of the product prepared in the step 2) to form a polyurea coating with the thickness of 1mm, and keeping the temperature of an oven at 60 ℃ for 10 hours to prepare the bulletproof plate.
In the embodiment, the bulletproof ceramic layer is used as a panel on the bullet-facing side of the bulletproof plate, and the bulletproof plate has 53-type 7.62 mm armor-piercing combustion bullet protection capability according to GJB 59.18-88 standard through a target test; the total thickness of the bulletproof plate is only 24mm, and the surface density is 39.9kg/m 2 Compared with the traditional armor plate for protecting 7.62 mm armor-piercing combustion bomb (the thickness is about 26mm, and the areal density is about 50 kg/m) 2 ) Light weight and thin.
The test results are shown in Table 4.
Table 4 target practice test results for the bulletproof plate of this example
| Bullet order | Bullet type | Incident angle | Distance between shots | Initial spring rate | Results of |
| 1 | 7.62mm | 0° | 10m | 811.5m/s | Without |
| 2 | 7.62mm | 0° | 10m | 814.6m/s | Without |
| 3 | 7.62mm | 0° | 10m | 814.3m/s | Without perforations |
EXAMPLE five
As shown in fig. 1, the bulletproof plate for an armored vehicle comprises a polyurea coating 1, a bulletproof ceramic layer 2 and an energy absorption layer 3, wherein the bulletproof ceramic layer 2 and the energy absorption layer 3 are bonded and fixed through polyurethane glue, and the outer coating layer 1 is uniformly coated on the surface of the bulletproof plate by polyurea SPUA-301 and has the thickness of 0.5mm; the thickness of the bulletproof ceramic layer is 7mm, and the thickness of the energy absorption layer is 17mm.
1) Preparing a bulletproof ceramic layer: a regular hexagon B with the side length of 30mm and the thickness of 7mm 4 C ceramic blocks are spliced into a bulletproof ceramic layer of 500mm multiplied by 7mm, B 4 The Vickers hardness of the C ceramic is 30GPa, and the density is 2.55g/cm 3 And then standby.
2) Preparing an energy absorption layer: aramid fiber III fiber fabric with the cut surface size of 500mm multiplied by 500mm is sprayed with Qtech-113 coupling agent for pretreatment, and TS230 thermosetting glue is coated on one surface of the bulletproof ceramic layer completed in the step 1); laying a layer of aramid fiber III fabric; and spraying a layer of HPUA-601 polyurea with the thickness of 0.5mm, then laying a layer of aramid III fiber fabric, spraying a layer of HPUA-601 polyurea with the thickness of 0.5mm, and alternately laying the aramid III fiber fabric and the HPUA-601 polyurea in such a way to form an energy absorption layer with the thickness of 17mm.
3) Coating a polyurea coating: uniformly spraying SPUA-301 polyurea on the outer surface of the product prepared in the step 2) to form a flame-retardant polyurea coating with the thickness of 0.5mm, and preserving heat for 6 hours at 80 ℃ in an oven to prepare the bulletproof plate.
In the embodiment, the bulletproof ceramic layer is used as a panel on the bullet-facing side of the bulletproof plate, and the bulletproof plate has 53-type 7.62 mm armor-piercing combustion bullet protection capability according to GJB 59.18-88 standard through a targeting test; the total thickness of the bulletproof plate is only 25mm, and the surface density is 41.6kg/m 2 Compared with the traditional armor plate for protecting 7.62 mm armor-piercing combustion bomb (the thickness is about 26mm, and the areal density is about 50 kg/m) 2 ) Light weight and thin.
The test results are shown in Table 5.
Table 5 target practice test results for the armor of this example
| Bullet order | Bullet type | Angle of incidence | Distance of shooting | Initial spring rate | Results of |
| 1 | 7.62mm | 0° | 10m | 803.5m/s | Without |
| 2 | 7.62mm | 0° | 10m | 809.4m/s | Without |
| 3 | 7.62mm | 0° | 10m | 811.8m/s | Without perforation |
Example six
As shown in fig. 1, the armor for armored vehicles comprises a polyurea coating 1, a bulletproof ceramic layer 2 and an energy absorption layer 3, wherein the bulletproof ceramic layer 2 and the energy absorption layer 3 are bonded and fixed through polyurethane glue, and an outer coating layer 1 is uniformly coated on the surface of the armor by adopting polyurea PUA-101 and has the thickness of 0.5mm; the thickness of the bulletproof ceramic layer is 12mm, and the thickness of the energy absorption layer is 12mm.
1) Preparing bulletproof ceramic layer: a regular quadrangle B with the side length of 30mm and the thickness of 12mm 4 C ceramic blocks are spliced into bulletproof ceramic layers of 500mm multiplied by 12mm, B 4 The Vickers hardness of the C ceramic is 28GPa, and the density is 2.52g/cm 3 And is ready for use;
2) Preparing an energy absorption layer: cutting T800 carbon fiber fabrics with the surface sizes of 500mm multiplied by 500mm, spraying Qtech-113 coupling agent on the T800 carbon fiber fabrics for pretreatment, and coating 540 polyurethane glue on one surface of the bulletproof ceramic layer finished in the step 1); then laying a layer of T800 carbon fiber fabric; spraying a layer of HPUA-601 polyurea with the thickness of 0.3mm, laying a layer of T800 carbon fiber fabric, spraying a layer of HPUA-601 polyurea with the thickness of 0.3mm, and alternately laying the T800 carbon fiber fabric and the HPUA-601 polyurea in such a way to form an energy absorption layer with the thickness of 12mm.
3) Coating a polyurea coating: and (3) uniformly spraying PUA-101 polyurea on the outer surface of the product prepared in the step 2) to form a polyurea coating with the thickness of 0.5mm, and keeping the temperature of an oven at 70 ℃ for 8 hours to prepare the bulletproof plate.
In the embodiment, the bulletproof ceramic layer is used as a panel on the bullet-facing side of the bulletproof plate, and the bulletproof plate has 53-type 7.62 mm armor-piercing combustion bullet protection capability according to GJB 59.18-88 standard through a targeting test; the total thickness of the bulletproof plate is only 25mm, and the surface density is 47.2kg/m 2 Compared with the traditional armor plate for protecting 7.62 mm armor-piercing combustion bomb (the thickness is about 26mm, and the areal density is about 50 kg/m) 2 ) Light weight and thin.
The test results are shown in Table 6.
Table 6 target practice test results for the armor of this example
| Bullet order | Bullet type | Incident angle | Distance of shooting | Initial spring rate | Results of |
| 1 | 7.62mm | 0° | 10m | 812.8m/s | Without |
| 2 | 7.62mm | 0° | 10m | 813.3m/s | Without |
| 3 | 7.62mm | 0° | 10m | 811.6m/s | Without perforation |
EXAMPLE seven
As shown in fig. 1, the bulletproof plate for an armored vehicle comprises a polyurea coating 1, a bulletproof ceramic layer 2 and an energy absorption layer 3, wherein the bulletproof ceramic layer 2 and the energy absorption layer 3 are bonded and fixed through polyurethane glue, and the outer coating layer 1 is uniformly coated on the surface of the bulletproof plate by polyurea SPUA-301 and has the thickness of 0.5mm; the thickness of the bulletproof ceramic layer is 10mm, and the thickness of the energy absorption layer is 12mm.
1) Preparing a bulletproof ceramic layer: splicing the regular hexagonal TBC ceramic blocks with the side length of 40mm and the thickness of 10mm into 500mm multiplied by 500mA bulletproof ceramic layer with the thickness of m multiplied by 10mm, the Vickers hardness of the TBC ceramic is 24GPa, and the density is 3.23g/cm 3 And is ready for use;
2) Preparing an energy absorption layer: cutting T800 carbon fiber fabrics with the surface size of 500mm multiplied by 500mm, spraying Qtech-113 coupling agent on the T800 carbon fiber fabrics for pretreatment, and coating 540 polyurethane glue on one surface of the bulletproof ceramic layer finished in the step 1); then laying a layer of T800 carbon fiber fabric; and spraying a layer of HPUA-601 polyurea with the thickness of 0.3mm, laying a layer of T800 carbon fiber fabric, spraying a layer of HPUA-601 polyurea with the thickness of 0.3mm, and alternately laying the T800 carbon fiber fabric and the HPUA-601 polyurea in such a way to form an energy absorption layer with the thickness of 12mm.
3) Coating a polyurea coating: uniformly spraying SPUA-301 polyurea on the outer surface of the product prepared in the step 2) to form a flame-retardant polyurea coating with the thickness of 0.5mm, and preserving heat for 10 hours at the temperature of 60 ℃ in an oven to prepare the bulletproof plate.
In the embodiment, the bulletproof ceramic layer is used as a panel on the bullet-facing side of the bulletproof plate, and the bulletproof plate has 53-type 7.62 mm armor-piercing combustion bullet protection capability according to GJB 59.18-88 standard through a targeting test; the total thickness of the bulletproof plate is only 23mm, and the surface density is 49 2 Compared with the traditional armor plate for protecting a 7.62 mm armor-piercing combustion bomb (the thickness is about 26mm, and the areal density is about 50 kg/m) 2 ) Light weight and thin.
The test results are shown in Table 7.
Table 7 target practice test results for the armor of this example
| Bullet order | Bullet type | Angle of incidence | Distance of shooting | Initial spring rate | Results of |
| 1 | 7.62mm | 0° | 10m | 809.5m/s | Without |
| 2 | 7.62mm | 0° | 10m | 814.8m/s | Without |
| 3 | 7.62mm | 0° | 10m | 813.3m/s | Without perforation |
Claims (9)
1. The utility model provides a bulletproof plate for armoured vehicle, includes outer cladding, shellproof ceramic layer and energy-absorbing layer which characterized in that: the bulletproof ceramic layer and the energy absorption layer are fixed through thermosetting adhesive, the outer coating layer is formed by coating polyurea on the outer surfaces of the bulletproof ceramic layer and the energy absorption layer, and the bulletproof ceramic layer is formed by splicing bulletproof ceramic blocks; the energy absorption layer is formed by alternately laying and compounding high-performance fiber fabrics and polyurea layers, and the thickness of the bulletproof ceramic layer is 7-12 mm; the thickness of the energy absorbing layer is 12-17 mm, and the thickness of the outer cladding layer is 0.5-1.0 mm.
2. The armor plate of claim 1, wherein: the single-layer thickness of the polyurea layer is 0.3 mm-0.5 mm.
3. The armor for armored vehicles of claim 1, wherein: the high-performance fiber fabric is one of carbon fiber fabric and aramid fiber fabric or a mixed system thereof.
4. The armor plate for armored vehicles according to any one of claims 1 to 3, wherein: the bulletproof ceramic block is B 4 C. One of TBC ceramics.
5. The armor for armored vehicles of claim 4, wherein: the side length of the bulletproof ceramic block is 25-50 mm.
6. The preparation method of the bulletproof plate for armored vehicles according to claim 1, which comprises the steps of preparing a bulletproof ceramic layer, preparing an energy absorption layer and coating a polyurea coating, and is characterized in that: the method comprises the following specific steps:
1) Preparing a bulletproof ceramic layer: seamlessly splicing the bulletproof ceramic blocks to form a bulletproof ceramic layer for later use according to the size of the needed bulletproof ceramic layer;
2) Preparing an energy absorption layer: cutting a fiber fabric with the same size as the external contour of the bulletproof ceramic layer, and spraying a Qtech-113 coupling agent on the cut fiber fabric for pretreatment; coating thermosetting adhesive on one surface of the bulletproof ceramic layer, then laying a layer of fiber fabric, spraying a layer of polyurea on the fiber fabric, laying a layer of fiber fabric, spraying a layer of polyurea, and alternately laying the fiber fabric and the polyurea in this order until the required thickness is reached to obtain an energy absorption layer;
3) Coating a polyurea coating: and (3) uniformly spraying polyurea on the outer surface of the product prepared in the step 2) to form an outer coating layer, and drying the outer coating layer in an oven to obtain the bulletproof plate.
7. The ballistic panel for armored vehicles of claim 6, wherein: the polyurea used in the step 2) is PUA-600 polyurea or HPUA-601 polyurea.
8. The ballistic panel for armored vehicles of claim 6, wherein: the polyurea used in the step 3) is SPUA-301 polyurea or PUA-101 polyurea.
9. The ballistic panel for armored vehicles of claim 6, wherein: the temperature of the oven in the step 3) is 60-80 ℃, and the temperature is kept for 6-10 h.
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