Multi-penetration-resistant ceramic armor array structure and preparation method thereof

Abstract

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.

Description

Technical Field

[0001] The present invention relates to the technical field of protective materials, and in particular to a ceramic armor array structure resistant to multiple penetrations and a preparation method thereof. Background Art

[0002] With the rapid development of anti-armor weapon technology, the battlefield survivability of weapons and equipment has placed higher demands on the performance of protective structural materials. The development of protective structural materials with low density, high penetration resistance, and high collapse resistance is of great significance to improving the battlefield mobility and survivability of our military's weapons and equipment or combat platforms. Ceramic protective structures are widely used in armored vehicle protection design due to their high strength and hardness. Traditional ceramic protective structures are formed by combining materials such as ceramics, metals, and polymer fibers in a certain order. However, due to the inherent brittleness of traditional ceramic materials, traditional ceramic protective structures are prone to brittle fracture and cannot meet the future battlefield requirements for protective structures with high penetration resistance and resistance to multiple rounds. The development of a new generation of armor protection requires breaking through traditional concepts and exploring new approaches through new materials, new processes, and new structures.

[0003] Many new protective structures have been proposed at home and abroad, such as new ceramic protective structures, lattice protective structures, three-dimensional connected ceramic skeleton structures, functional gradient protective structures, and bionic protective structures. In theory, different new structures have certain advantages over traditional ceramic protective structures. However, the preparation methods of new protective structures are complex, the preparation costs are high, and it is difficult to achieve rapid manufacturing and large-scale batch production. In addition, there are great difficulties in facing complex problems at different levels such as heterogeneous interface wetting, wave impedance mismatch, large-scale high-quality molding, and increasing ceramic content. This makes it difficult for the new ceramic composite structures actually prepared to reflect the theoretical excellent protective performance and to fully meet the needs of large-scale equipment.

[0004] Therefore, it is necessary to develop a new type of low-cost, high-protection ceramic protective structure and develop a high-quality, high-throughput, and modular production process. This is of great significance for the cross-generational upgrade of our military weapons and equipment and further improving the mobility and protection of our military combat platforms. Summary of the Invention

[0005] The main inventive concept of this application is: in order to solve the problems that the armor protection design concept is limited by existing materials and structures, the lightweight protection anti-ballistic performance is insufficient, the preparation method of the new protection structure is complicated, and the molding quality is poor, carbon fiber toughened ceramics are used as the main material, and a high-toughened carbon ceramic structure is designed by adopting gradient array. Through pressure infiltration integrated molding technology, a strong and tough matching ceramic composite material module suitable for projectile impact is prepared, and its resistance to multiple bullets is improved without increasing the weight of the composite protection. For this purpose, a ceramic armor array structure resistant to multiple penetrations and a preparation method thereof are proposed. The method utilizes gradient array design and pressure infiltration integrated molding. The prepared ceramic protection array structure has the advantages of light weight and high efficiency in resisting multiple penetrations, providing technical support for the design and preparation of a new generation of high-protection-performance ceramic protection structures.

[0006] Specifically, the first aspect of the present application provides a ceramic armor array structure resistant to multiple penetrations, comprising a plurality of carbon-ceramic units arranged in an array, wherein the spaces between the plurality of carbon-ceramic units are filled with cold-pressed B4C powder and pressure-infiltrated with molten aluminum, and the carbon-ceramic units are composed of a pure ceramic layer and a gradient stack of sized carbon fiber cloths of different thicknesses.

[0007] By adopting the above technical solution: it has the advantages of being lightweight and highly effective in resisting multiple penetrations, and is a strong and tough ceramic composite material module suitable for projectile impact. It improves its resistance to multiple penetrations without increasing the weight of the composite protection.

[0008] A second aspect of the present application provides a method for preparing the above-mentioned ceramic protection array structure against multiple penetrations, comprising the following steps: S1. Design and preparation of carbon ceramic units: By controlling the impregnation of carbon fiber cloth with ceramic slurries of different consistencies and viscosities, a series of green sheets with differentiated carbon fiber distribution and sizing rates are designed. Carbon ceramic unit products are prepared through gradient stacking and optimized sintering process. S2. Design and preparation of preform blank: Arrange carbon ceramic unit products in an array and fill the gaps between the carbon ceramic units with B4C powder of gradient packing density, and then cold press them into preform blank; S3. Design and preparation of ceramic protective array structure: Using the pressure infiltration method, the aluminum liquid and the preform blank are integrated to form a ceramic protective array structure that can resist the penetration of multiple 14.5mm incendiary bombs.

[0009] By adopting the above technical solution: the above preparation method is simple and convenient, and utilizes gradient array design and pressure infiltration integrated molding. The prepared ceramic protective array structure has the advantages of being light and highly effective in resisting multiple penetrations, providing technical support for the design and preparation of a new generation of high-protection-efficiency ceramic protective structures.

[0010] As an optional technical solution of the present application, the carbon fiber cloth in S1 is a two-dimensional woven cloth of carbon fibers of different counts, and the ceramic slurry is a slurry prepared from one or more groups of ceramic powders of SiC, Si3N4, and B4C.

[0011] By adopting the above technical solution: flexible structural design and adjustable performance. The selection of carbon fiber cloth with different counts can absorb the slurry faster and provide higher fracture toughness and impact performance. By using carbon fiber cloth with different counts in different layers, a gradient design can be achieved. Ceramic slurries can be used in combination. For example: SiC + Si3N4: can significantly improve toughness and thermal shock resistance while maintaining good high-temperature performance and hardness; SiC + B4C: can greatly improve hardness and wear resistance; Si3N4 + B4C: can provide extremely high hardness and certain toughness.

[0012] As an optional technical solution of the present application, the method for implementing the differentiated carbon fiber distribution in S1 is as follows: it is achieved by controlling the number of layers of carbon fiber cloth and the count of carbon fibers in each layer.

[0013] By adopting the above technical solutions, the mechanical properties (strength, stiffness) of the structure can be precisely configured where they are most needed with the highest material efficiency and lowest weight cost, thereby achieving the best balance between performance, weight and cost.

[0014] As an optional technical solution of the present application, the method for achieving the differentiated sizing rate in S1 is as follows: different consistencies and viscosities are controlled by adding amounts of polyethylene oxide and carboxymethyl cellulose, and the addition amounts of the two are controlled between 0.5% and 20% of the total mass of the ceramic slurry.

[0015] By adopting the above technical solution, the sizing effect is excellent, so that the ceramic slurry can be pressed into the carbon-ceramic unit product as much as possible, thereby improving the sizing effect.

[0016] As an optional technical solution of the present application, the carbon-ceramic unit product in S1 is composed of a gradient stack of pure ceramic layers and sized carbon fiber cloths of different thicknesses.

[0017] By adopting the above technical solution: through the gradient design of material components and structures, the thermal properties (thermal shock resistance), mechanical properties (high strength, high toughness, impact resistance) and surface properties (high hardness, wear resistance, oxidation resistance) are synergistically optimized at the micro and macro levels, effectively solving the problems of traditional ceramics' high brittleness and poor thermal shock resistance, as well as the high-temperature oxidation of carbon fiber, thereby achieving performance complementarity and improvement; through sizing treatment and gradient transition, the interface bonding between different materials is significantly improved, thereby improving the overall structural integrity and reliability.

[0018] As an optional technical solution of the present application, the thickness of the pure ceramic layer in S1 is 0-10 mm, and the thickness of the sized carbon fiber cloth is 0.1-5 mm.

[0019] As an optional technical solution of the present application, the array arrangement in S2 is to place carbon ceramic unit products in a certain arrangement order in the graphite core mold.

[0020] As an optional technical solution of the present application, the cold pressing method in step S2 is as follows: a pressure of 10-20 MPa is applied to the carbon ceramic unit product and the B4C powder using a press, and the pressure is maintained for 5-10 minutes.

[0021] As an optional technical solution of the present application, the pressure infiltration method in S3 is as follows: the aluminum liquid is quickly poured into the graphite core mold containing the preform blank, the pressure head is placed, the pressure is applied to 10~50 MPa, the speed is 0.1~0.8 mm / s, and then the pressure is maintained for 15~20 minutes.

[0022] By adopting the above technical solution: the ceramic protection array structure for multiple penetration resistance prepared by the above method, a highly toughened carbon ceramic structure is designed using a gradient array, and a strong and tough ceramic composite material module suitable for projectile impact is prepared through pressure infiltration integrated molding technology. Without increasing the weight of the composite protection, this structure organically combines the gradient toughened carbon ceramic unit (high hardness, high toughness, and collapse resistance) with the B4C / Al metal ceramic filling matrix (ultra-high hardness, good toughness, energy absorption, and support constraint) through an array arrangement, achieving the following: Localized damage: The damage range of a single impact is limited.

[0023] Multi-stage energy dissipation: The projectile kinetic energy is efficiently consumed through various mechanisms such as ceramic crushing, fiber toughening, particle abrasion, and metal plastic deformation.

[0024] Structural integrity maintained: intact cells and fill matrix retain their protective function.

[0025] Multiple defense redundancy: Provides multiple levels of energy absorption and projectile destruction mechanisms.

[0026] Optimal results: When facing multiple continuous penetrations (such as machine gun fire and shrapnel impacts), the composite armor structure demonstrates protective effectiveness and survivability far exceeding that of homogeneous armor or traditional ceramic composite armor. It is an ideal solution for dealing with high-threat, high-density firepower strikes and is widely used in armored vehicles, armed helicopters, and important facility protection. Its essence is to solve the problem of ceramic materials resisting multiple strikes through the intelligent structural design of "sacrificing the part to preserve the whole", and at the same time prepare.

[0027] The working principle and beneficial effects of this application are: 1. The ceramic protective array structure against multiple penetrations in this application has the advantages of being lightweight and highly effective in resisting multiple penetrations. It is a strong and tough ceramic composite material module suitable for projectile impact, which improves its resistance to multiple penetrations without increasing the weight of the composite protection.

[0028] 2. The ceramic protective array structure for multiple penetration resistance prepared by the aforementioned method utilizes a gradient array design to create a highly toughened carbon-ceramic structure. Through pressure infiltration integrated molding technology, a strong-tough ceramic composite module suitable for projectile impact is produced. Without increasing the weight of the composite protection, this structure organically combines gradient-toughened carbon-ceramic units (high hardness, high toughness, and collapse resistance) with a B4C / Al metal-ceramic filler matrix (ultra-high hardness, excellent toughness, energy absorption, and support and restraint) through an array arrangement. This achieves: Damage localization: The damage range of a single impact is limited. Multi-level energy dissipation: The projectile's kinetic energy is efficiently dissipated through various mechanisms, including ceramic crushing, fiber toughening, particle abrasion, and metal plastic deformation. Structural integrity maintenance: Undamaged units and the filler matrix retain their protective function. Multiple defense redundancy: Multiple levels of energy absorption and projectile destruction mechanisms are provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present application will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0030] Figure 1 It is a schematic diagram of the process of preparing the ceramic protection array structure; Figure 2 This is a physical picture of a carbon ceramic unit product; Figure 3 This is the stress cloud diagram of the ceramic protective array structure when resisting vertical penetration of a 14.5mm incendiary bomb.

[0031] The markings of the various technical features in the accompanying drawings are as follows: 1. Carbon ceramic unit product; 2. Graphite core mold; 3. B4C powder; 4. Liquid aluminum; 5. Indenter. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0033] Specifically, the first aspect of the present application provides a ceramic armor array structure resistant to multiple penetrations, comprising a plurality of carbon-ceramic units arranged in an array, wherein the spaces between the plurality of carbon-ceramic units are filled with cold-pressed B4C powder and pressure-infiltrated with molten aluminum, and the carbon-ceramic units are composed of a pure ceramic layer and a gradient stack of sized carbon fiber cloths of different thicknesses.

[0034] The above-mentioned ceramic protective array structure has the advantages of being lightweight and highly effective in resisting multiple penetrations. It is a strong and tough ceramic composite material module suitable for projectile impact, which improves its resistance to multiple penetrations without increasing the weight of the composite protection.

[0035] A second aspect of this embodiment provides a method for preparing the above-mentioned ceramic protection array structure against multiple penetrations, comprising the following steps: S1. Design and preparation of carbon ceramic units: By controlling the impregnation of carbon fiber cloth with ceramic slurries of different consistencies and viscosities, a series of green sheets with differentiated carbon fiber distribution and sizing rates are designed. Carbon ceramic unit products are prepared through gradient stacking and optimized sintering process. S2. Design and preparation of preform blank: Arrange carbon ceramic unit products in an array and fill the gaps between the carbon ceramic units with B4C powder of gradient packing density, and then cold press them into preform blank; S3. Design and preparation of ceramic protective array structure: Using the pressure infiltration method, the aluminum liquid and the preform blank are integrated to form a ceramic protective array structure that can resist the penetration of multiple 14.5mm incendiary bombs.

[0036] By adopting the above technical solution: the above preparation method is simple and convenient, and utilizes gradient array design and pressure infiltration integrated molding. The prepared ceramic protective array structure has the advantages of being light and highly effective in resisting multiple penetrations, providing technical support for the design and preparation of a new generation of high-protection-efficiency ceramic protective structures.

[0037] In this embodiment, the carbon fiber cloth in S1 is a two-dimensional woven cloth of carbon fibers of different counts, and the ceramic slurry is a slurry prepared from one or more groups of ceramic powders selected from SiC, Si3N4, and B4C.

[0038] Through the above method, the structural design is flexible and the performance is adjustable. The selection of carbon fiber cloth with different counts can absorb the slurry faster and provide higher fracture toughness and impact performance. By using carbon fiber cloth with different counts in different layers, a gradient design can be achieved. Ceramic slurries can be used in combination. For example: SiC + Si3N4: can significantly improve toughness and thermal shock resistance while maintaining good high-temperature performance and hardness; SiC + B4C: can greatly improve hardness and wear resistance; Si3N4 + B4C: can provide extremely high hardness and certain toughness.

[0039] In this embodiment, the differentiated carbon fiber distribution in step S1 is achieved as follows: by controlling the number of carbon fiber cloth layers and the count of carbon fibers in each layer, the mechanical properties (strength, stiffness) of the structure can be precisely configured where they are most needed with the highest material efficiency and the lowest weight cost, thereby achieving an optimal balance between performance, weight, and cost.

[0040] In this embodiment, the differentiated sizing rate in step S1 is achieved as follows: different consistencies and viscosities are controlled by adding polyethylene oxide and carboxymethyl cellulose, and the addition amounts of the two are controlled between 0.5% and 20% of the total mass of the ceramic slurry. The sizing effect is excellent, so that the ceramic slurry can be pressed into the carbon-ceramic unit product as much as possible, thereby improving the sizing effect.

[0041] In this embodiment, the carbon-ceramic unit product in step S1 is composed of a gradient stack of pure ceramic layers and sized carbon fiber cloths of different thicknesses. Through the gradient design of material components and structures, the thermal properties (thermal shock resistance), mechanical properties (high strength, high toughness, impact resistance) and surface properties (high hardness, wear resistance, and oxidation resistance) are synergistically optimized at the micro and macro levels, effectively solving the problems of high brittleness and poor thermal shock resistance of traditional ceramics and easy oxidation of carbon fibers at high temperatures, thereby achieving complementary and enhanced performance. Through sizing treatment and gradient transition, the interface bonding between different materials is significantly improved, thereby enhancing the overall structural integrity and reliability.

[0042] In this embodiment, the thickness of the pure ceramic layer in step S1 is 0-10 mm, and the thickness of the sized carbon fiber cloth is 0.1-5 mm.

[0043] In this embodiment, the array arrangement in step S2 is to place the carbon ceramic unit products in a certain arrangement order in the graphite core mold.

[0044] In this embodiment, the cold pressing method in step S2 is as follows: a pressure of 10-20 MPa is applied to the carbon ceramic unit product and the B4C powder using a press, and the pressure is maintained for 5-10 minutes.

[0045] In this embodiment, the pressure infiltration method in step S3 is as follows: the aluminum liquid is quickly poured into the graphite core mold containing the preform blank, a pressure head is placed, a pressure of 10-50 MPa is applied at a speed of 0.1-0.8 mm / s, and then the pressure is maintained for 15-20 minutes.

[0046] The ceramic array structure for protection against multiple penetrations fabricated by the aforementioned method utilizes a gradient array design to create a highly toughened carbon-ceramic structure. Through pressure infiltration integrated molding technology, a strong-tough ceramic composite module is fabricated, suitable for projectile impacts. Without increasing the weight of the composite protection, this structure organically combines gradient-toughened carbon-ceramic units (high hardness, high toughness, and collapse resistance) with a B4C / Al metal-ceramic filler matrix (ultra-high hardness, excellent toughness, energy absorption, and support and restraint) in an array arrangement. This achieves: Damage localization: The damage range of a single impact is limited; Multi-level energy dissipation: Efficiently dissipating projectile kinetic energy through various mechanisms, including ceramic crushing, fiber toughening, particle abrasion, and metal plastic deformation; Structural integrity maintenance: Undamaged units and the filler matrix retain their protective functionality; Multiple defense redundancy: Providing multiple levels of energy absorption and projectile destruction mechanisms.

[0047] The examples of specific preparation methods are as follows: Example 1: Step S1: Select 3k carbon fiber bundles and weave them into a two-dimensional fiber cloth. Add polyethylene oxide and carboxymethyl cellulose to the SiC ceramic slurry at 2% and 8% respectively, and impregnate the two-dimensional fiber cloth into it. The single-layer fiber impregnated green sheet is stacked in different orders according to the pre-designed gradient. The spacing order from top to bottom is: a pure ceramic layer with a thickness of 5 mm, a gradient sized fiber cloth with thicknesses of 2 mm, 1 mm, 0.5 mm, and 0.2 mm. The carbon ceramic unit product 1 is produced by hot pressing and sintering, as shown in FIG. Figure 2 shown.

[0048] Step S2: After placing the carbon ceramic unit products 1 in a close-packed order in the graphite core mold 2, pour the B4C powder 3 into the gaps between the carbon ceramic unit products 1. Apply a pressure of 20 MPa using a press and maintain the pressure for 10 minutes to form a preform.

[0049] Step S3: Figure 1 As shown, the aluminum liquid 4 is quickly poured into the graphite core mold 2 containing the preform, and the pressure head 5 is placed. The pressure is 50 MPa and the speed is 0.1 mm / s. Then the pressure is maintained for 15 minutes, the pressure is released, and the ceramic protective array structure is air-cooled. The surface density of the obtained ceramic protective array structure is 90 kg / m 2 .

[0050] Example 2: Step S1: Select 3k carbon fiber bundles and weave them into a two-dimensional fiber cloth. Add polyethylene oxide and carboxymethyl cellulose to the SiC / Si3N4 ceramic slurry at 15% and 5% respectively, and impregnate the two-dimensional fiber cloth into it. The single-layer fiber impregnated green sheets are stacked in different orders according to the pre-designed gradient. The spacing order from top to bottom is: a pure ceramic layer with a thickness of 4 mm, a gradient sized fiber cloth with thicknesses of 3 mm, 1.5 mm, 0.5 mm, and 0.1 mm. The carbon ceramic unit product 1 is produced by hot pressing and sintering, as shown in FIG. Figure 2 shown.

[0051] Step S2: After placing the carbon ceramic unit products 1 in a close-packed order in the graphite core mold 2, pour in the B4C powder 3, filling the gaps between the carbon ceramic unit products 1. A press is applied with a pressure of 15 MPa and maintained for 5 minutes to form a preform.

[0052] Step S3: Figure 1 As shown in the figure, the aluminum liquid 4 is quickly poured into the graphite core mold 2 containing the preform, and the pressure head 5 is placed. The pressure is 30 MPa and the speed is 0.1 mm / s. Then the pressure is maintained for 20 minutes, the pressure is released, and the ceramic protective array structure is air-cooled. The surface density of the obtained ceramic protective array structure is 85 kg / m 2 .

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] Through material optimization and process design, the overall surface density of the ceramic protection array structure is reduced to 85kg / m 2 At the same time, it can effectively defend against 14.5mm incendiary bullets. Figure 3 This is a stress cloud diagram of a ceramic protective array structure against vertical penetration by a 14.5mm incendiary projectile. A 500 mm × 600 mm protective structure can protect against three projectiles. The test results demonstrate that this invention is scientific and rational, and can be used to guide the design and fabrication of ceramic protective structures.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ceramic armor array structure resistant to multiple penetrations, characterized in that: The invention comprises a plurality of carbon ceramic unit products (1) arranged in an array, wherein cold-pressed B4C powder (3) is filled between the plurality of carbon ceramic unit products (1) and pressure-infiltrated with aluminum liquid (4), and the carbon ceramic unit products (1) are composed of a pure ceramic layer and a gradient stack of sized carbon fiber cloths of different thicknesses.

2. A method for preparing the ceramic protective array structure against multiple penetrations according to claim 1, characterized in that: The following steps are involved: S1. Design and preparation of carbon ceramic unit products (1): By controlling the impregnation of carbon fiber cloth with ceramic slurries of different consistencies and viscosities, a series of green sheets with differentiated carbon fiber distribution and differentiated sizing rates are designed, and the carbon ceramic unit products (1) are prepared by gradient stacking and optimizing the sintering process; S2. Design and preparation of preform blank: Arrange carbon ceramic unit products (1) in an array and fill the gaps between the carbon ceramic unit products (1) with B4C powder (3) of gradient packing density, and form a preform blank by cold pressing; S3. Design and preparation of a ceramic protective array structure: A pressure infiltration method is used to integrate the aluminum liquid (4) with the preform blank to form a ceramic protective array structure capable of resisting the penetration of multiple 14.5mm incendiary bombs.

3. The method for preparing a ceramic armor array structure resistant to multiple penetrations according to claim 2, characterized in that: The carbon fiber cloth in S1 is a two-dimensional woven cloth of carbon fibers of different counts, and the ceramic slurry is a slurry prepared from one or more groups of ceramic powders selected from SiC, Si3N4, and B4C.

4. The method for preparing a ceramic armor array structure resistant to multiple penetrations according to claim 2, characterized in that: The differentiated carbon fiber distribution in S1 is achieved by controlling the number of carbon fiber cloth layers and the number of carbon fibers in each layer.

5. The method for preparing a ceramic armor array structure resistant to multiple penetrations according to claim 2, characterized in that: The differentiated sizing rate in S1 is achieved as follows: different consistencies and viscosities are controlled by adding polyethylene oxide and carboxymethyl cellulose, and the addition amounts of the two are controlled between 0.5% and 20% of the total mass of the ceramic slurry.

6. The method for preparing a ceramic armor array structure resistant to multiple penetrations according to claim 2, characterized in that: The carbon ceramic unit product (1) in S1 is composed of a gradient stack of pure ceramic layers and sized carbon fiber cloths of different thicknesses.

7. The method for preparing a ceramic armor array structure resistant to multiple penetrations according to claim 6, characterized in that: The thickness of the pure ceramic layer in S1 is 0-10 mm, and the thickness of the sized carbon fiber cloth is 0.1-5 mm.

8. The method for preparing a ceramic armor array structure resistant to multiple penetrations according to claim 2, characterized in that: The array arrangement in S2 is to place the carbon ceramic unit products (1) in a certain arrangement order in the graphite core mold (2).

9. The method for preparing a ceramic armor array structure resistant to multiple penetrations according to claim 2, characterized in that: The cold pressing method in S2 is as follows: a pressure of 10-20 MPa is applied to the carbon ceramic unit product (1) and the B4C powder (3) using a press, and the pressure is maintained for 5-10 minutes.

10. The method for preparing a ceramic armor array structure resistant to multiple penetrations according to claim 2, characterized in that: The pressure infiltration method in S3 is as follows: the aluminum liquid (4) is quickly poured into the graphite core mold (2) containing the preform blank, a pressure head (5) is placed, a pressure of 10-50 MPa is applied at a speed of 0.1-0.8 mm / s, and then the pressure is maintained for 15-20 minutes.

Images