Composite armor plate containing titanium alloy encapsulated and spliced ​​ceramic panels and preparation method thereof

Abstract

The present invention provides a composite armor plate containing titanium alloy encapsulated spliced ​​ceramic panels and a preparation method thereof, wherein the composite armor plate comprises a panel layer, a first transition layer, a second transition layer and a PE backplane layer which are sequentially superimposed and connected; the panel layer is composed of at least one layer of ceramic panels encapsulated by the titanium alloy, and each layer of the ceramic panels is formed by splicing and bonding a plurality of large and small ceramic blocks which are all isosceles trapezoidal hexahedrons according to certain splicing rules, so that a flat plane is formed on the side facing the human body, and a plurality of isosceles trapezoidal protrusions and a plurality of isosceles trapezoidal depressions which are arranged at intervals in the horizontal direction and the longitudinal direction are formed on the side facing the bullet. The present invention is easy to process and assemble, has low process cost, improves the overall ability of the armor plate to resist multiple bullet strikes, and reduces the probability of secondary injury caused by splashing of fragmented blocks after being hit by bullets.

Description

Technical Field

[0001] The invention belongs to the technical field of bulletproof armor plates, and in particular relates to a composite armor plate comprising titanium alloy encapsulated and spliced ​​ceramic panels and a preparation method thereof. Background Art

[0002] The development of armor protection materials has evolved from the initial single metal material to synthetic polymer flexible materials, and then to diversified rigid-flexible composite materials. The development of modern armor protection technology has made composite armor more and more diversified. Common composite armor can be divided into composite material / composite material armor, ceramic / metal material armor, honeycomb sandwich structure armor, ceramic unit composite panel armor, and the combination of high-performance ceramics, alloy materials and high-performance fiber composite materials has gradually realized composite armor protection materials that combine high protection performance and lightweight advantages.

[0003] Due to the complexity of composite armor structure and materials, the protection mechanism of each component is also different. Ceramics and armor steel rely on high hardness to resist the penetration of projectiles, while high-performance fiber composite materials are mainly energy absorption mechanisms, absorbing energy through the fracture of the reinforcement and the plastic deformation of the matrix, and have good anti-penetration, anti-fragmentation and explosion-proof properties. Therefore, the use of high-performance fiber anti-ballistic composite materials in the field of armor protection can not only greatly reduce the weight of armor, but also provide higher anti-ballistic performance. It is a key material technology to promote the development of armor protection materials towards lightweight and high-strength.

[0004] With the advancement of modern military technology, higher requirements have been placed on the performance of armor protection materials. The demand for high strength and lightweight means that the entire panel layer of the current ceramic plate / back plate composite armor will be damaged once it is hit, making it difficult to withstand the impact of multiple bullets. Summary of the invention

[0005] In view of this, the present invention proposes a composite armor plate containing titanium alloy encapsulated spliced ​​ceramic panels and a preparation method thereof, specifically:

[0006] A composite armor plate containing titanium alloy encapsulated and spliced ​​ceramic panels, comprising a panel layer, a first transition layer, a second transition layer and a PE back layer stacked and connected in sequence;

[0007] The panel layer is composed of at least one layer of ceramic panel encapsulated by titanium alloy. Each layer of ceramic panel is composed of a plurality of ceramic blocks divided into large ceramic blocks and small ceramic blocks. The large and small ceramic blocks are both isosceles trapezoidal hexahedrons, and the facades on the front and rear sides are both isosceles trapezoidal, and the top, bottom, left and right sides are all rectangular.

[0008] The large and small ceramic blocks have the same inclination angle and thickness, the height of the large ceramic block is greater than the height of the small ceramic block, the length of the top surface length side of the large ceramic block is greater than the length of the top surface length side of the small ceramic block, the length of the bottom surface length side of the large ceramic block is greater than the length of the bottom surface length side of the small ceramic block, and the length of the bottom surface length side of the small ceramic block is greater than the length of the top surface length side of the large ceramic block;

[0009] The splicing rules of each layer of ceramic panels are as follows: it is composed of multiple rows of ceramic blocks arranged in sequence along the vertical column, each row of ceramic blocks is composed of multiple large ceramic blocks and small ceramic blocks arranged in sequence along the horizontal row, the top surfaces of the large ceramic blocks in each row are facing upward, and the top surfaces of the small ceramic blocks are facing downward, and the inclined surfaces of the large ceramic blocks in the same row are in contact with the inclined surfaces of the adjacent small ceramic blocks; the bottom surfaces of the large ceramic blocks and the top surfaces of the small ceramic blocks in the same layer are in the same plane; the vertical surfaces of the small ceramic blocks in the same column are in contact with the corresponding vertical surfaces of the adjacent large ceramic blocks, and the angle line of the inclination angle of the small ceramic block is coplanar with the inclined surface of the corresponding side of the adjacent large ceramic block.

[0010] Furthermore, the thickness of the ceramic block ranges from 9 to 21 mm, the length of the length side of the top surface ranges from 15 to 30 mm, the height ranges from 18-25 mm, the inclination angle ranges from 48° to 70°, the lengths of the width sides of the top and bottom surfaces are equal, and the length of the length side of the bottom surface is greater than the length of the length side of the top surface.

[0011] Furthermore, the material of the ceramic block is one of boron carbide ceramics, titanium boride ceramics, silicon carbide ceramics or alumina ceramics.

[0012] Furthermore, the first transition layer is composed of five layers of high-performance fiber hybrid composite material plates made of aramid / carbon fiber hybrid reinforced polymer matrix composite materials, and the hybrid method adopts interlayer hybridization;

[0013] The second transition layer is made of Nomex honeycomb panel cast with bismaleimide resin;

[0014] The back panel is made of ultra-high molecular weight polyethylene fiber prepreg by hot pressing.

[0015] A method for preparing a composite armor plate containing titanium alloy encapsulated and spliced ​​ceramic panels, characterized by comprising:

[0016] The ceramic panel is bonded according to the splicing rules as described above, and then the ceramic panel is encapsulated with titanium alloy by casting, powder metallurgy or ceramic metallization to form a panel layer, and the overall thickness of the panel layer is 22-35 mm;

[0017] The first transition layer is composed of five layers of high-performance fiber hybrid composite materials, which are made of aramid / carbon fiber hybrid reinforced polymer matrix composite materials. The overall thickness is about 1-6mm. The first layer is close to the bullet-facing surface. The fiber volume fractions of aramid fibers and carbon fibers in each layer are shown in the following table:

[0018]

[0019] The second transition layer is prepared by casting bismaleimide resin on the Nomex honeycomb board. The overall thickness of this layer is about 6-12mm. The resin is cast evenly and the casting thickness is the same as the height of the honeycomb board.

[0020] The first transition layer and the panel layer are bonded together using a hot melt adhesive film layer to form a prefabricated part. A hot melt adhesive film layer is added between the two layers. The thickness of the hot melt adhesive film layer is 0.1-0.16mm and the surface density is 110±16g / m 2 The material is one of PU film, EVA film, polyurethane film, thermosetting film, thermoplastic film and phenolic resin film; the preform is placed in a vacuum bag and evacuated to a vacuum state, and then enters an autoclave for staged heating and vacuuming. The operation steps are as follows: (1) The first stage time is 15-50 minutes, the vacuum pressure is 0.5-1.8 MPa, and the temperature is 75-110°C; (2) The second stage time is 40-100 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C; (3) The third stage time is 20-70 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C; and then cooled to obtain the final preform;

[0021] Prepare PE backsheet with a surface density of 80-160g / m 2 The PE prepreg is cut to size, and then layered and hot-pressed. The overall thickness of the backplane is about 8-20 mm. The hot-pressing process is as follows: (1) In the first stage, the mold is heated to 60-100 ° C and the pressure is 5-15 MPa; (2) In the first stage, the mold is heated to 100-130 ° C and the pressure is 12-18 MPa; (3) In the first stage, the mold is heated to 130-150 ° C and the pressure is 15-25 MPa; After the three-stage operation is completed, stop heating and pressurizing, keep warm and pressurized for 25-80 minutes, and when the temperature drops to 30-50 ° C, release the pressure and take out the PE board, and then use an ultra-high pressure water jet cutting machine to cut;

[0022] The composite armor plate is formed by laying the PE back sheet, the second transition layer and the final prefabricated parts with the face sheet facing upwards in the order of laying. A hot melt adhesive film is embedded in each bonding surface. The thickness of the hot melt adhesive film layer is 0.1-0.16mm and the surface density is 110±16g / m 2The material is one of PU film, EVA film, polyurethane film, thermosetting film, thermoplastic film and phenolic resin film;

[0023] The composite armor plate is placed in a vacuum bag as a whole, evacuated, and then placed in an autoclave for staged heating and evacuation, and a molded part is obtained after cooling. The operation steps are as follows: (1) The first stage lasts 15-50 minutes, the vacuum pressure is 1-1.5 MPa, and the temperature is 75-110°C; (2) The second stage lasts 40-100 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C; (3) The third stage lasts 20-70 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C.

[0024] The invention is easy to process and assemble, has low process cost, improves the overall ability of the armor plate to resist multiple bullet strikes, and reduces the probability of secondary damage caused by splashing of fragments after being hit by bullets. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the composite layer structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the dimensions of a single ceramic block;

[0028] Figure 3 Schematic diagram of the splicing rules of adjacent ceramic blocks in the horizontal direction;

[0029] Figure 4 A schematic diagram of the splicing rules of adjacent ceramic blocks in the longitudinal direction;

[0030] Figure 5 This is a schematic diagram illustrating the protection capabilities of ceramic panels;

[0031] Figure 6 Schematic diagram of the structure of a spliced ​​single-layer ceramic panel, where (a) is a top view, (b) is a front view, and (c) is a stereogram;

[0032] Figure 7 This is a schematic diagram of the structure of the Nomex honeycomb panel. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] like Figure 1 As shown, the composite armor plate of titanium alloy-encapsulated spliced ​​ceramic panels and the preparation method thereof of the present invention comprises a panel layer 1, a first transition layer 2, a second transition layer 3 and a PE backboard layer 4 which are sequentially stacked and connected;

[0036] Panel layer 1 is composed of a ceramic panel encapsulated in titanium alloy. The ceramic panel is composed of Figure 2 The ceramic blocks shown are spliced ​​together, and the ceramic blocks used are isosceles trapezoidal hexahedrons, whose front and rear facades are both isosceles trapezoids, and the top, bottom, left and right sides are all rectangles; wherein, the length of the width side of the top surface, that is, the distance between the front and rear facades, is defined as the thickness a of the ceramic block, and the thickness a ranges from 9 to 21 mm, the length b of the length side of the top surface ranges from 15 to 30 mm, the height h between the upper and lower surfaces ranges from 18 to 25 mm, and the angles between the left and right inclined surfaces and the bottom surface are defined as the inclination angles, and the angle θ of the inclination angle ranges from 48° to 70°, the lengths of the width sides of the top and bottom surfaces are equal, and the length c of the length side of the bottom surface is greater than the length b of the length side of the top surface.

[0037] The ceramic blocks are divided into two specifications, namely, large ceramic blocks A and small ceramic blocks B. The large and small ceramic blocks have the same inclination angle θ and thickness a. The height of the large ceramic block A is greater than the height of the small ceramic block B. The length of the top surface length of the large ceramic block A is greater than the length of the top surface length of the small ceramic block B. The length of the bottom surface length of the large ceramic block A is greater than the length of the bottom surface length of the small ceramic block B. The length of the bottom surface length of the small ceramic block B is greater than the length of the top surface length of the large ceramic block ( Figure 4 visible);

[0038] The ceramic panel is composed of a number of large ceramic blocks A and small ceramic blocks B spliced ​​together according to certain splicing rules, see Figure 3 , Figure 4 and Figure 6 As shown, Figure 3 The figure shows the rules for joining adjacent ceramic blocks in the horizontal direction. Figure 4 The diagram shows the rules for splicing adjacent ceramic blocks in the longitudinal direction, and then closely arranging them in sequence to form a ceramic plate. Figure 6According to this splicing rule, the bonding ability of large and small ceramic blocks adjacent to each other in the horizontal and vertical directions can be maximized, and the weak protection area caused by the splicing gap can be reduced. Specifically, the ceramic panel is composed of multiple rows of ceramic blocks arranged in sequence along the vertical column direction, and each row of ceramic blocks is composed of multiple large ceramic blocks A and small ceramic blocks B arranged in sequence along the horizontal row. The top surface of the large ceramic block A in each row of ceramic blocks faces upward, and the top surface of the small ceramic block B faces downward. The inclined surface of the large ceramic block A in the same row of ceramic blocks is in contact with the inclined surface of the adjacent small ceramic block B. The bottom surfaces of all the large ceramic blocks A and the top surfaces of all the small ceramic blocks B in the ceramic panel are located in the same plane, and the plane is defined as the bottom surface of the ceramic panel; the vertical surfaces of each small ceramic block B in the same row of ceramic blocks are in contact with the corresponding vertical surfaces of the large ceramic block A in the adjacent row of ceramic blocks, that is, the vertical surfaces of the small ceramic blocks B in the same column are in contact with the corresponding vertical surfaces of the adjacent large ceramic blocks A, and the angle line 11 of the inclination angle of the small ceramic block B2 is coplanar with the inclined surface 12 of the corresponding side of the adjacent large ceramic block A1 (see Figure 4 ); The ceramic panel formed by the above-mentioned rules forms a flat surface on the side facing the human body, and forms a plurality of isosceles trapezoidal protrusions and a plurality of isosceles trapezoidal depressions arranged in a horizontal direction and a vertical direction at intervals on the other side facing the bullet (see Figure 5 ).

[0039] The design of the ceramic block with six flat sides is not subject to process restrictions during preparation, and the structure is easy to form. The entire panel layer contains two sizes of ceramics, so only two sets of molds are needed for preparation. Compared with other complex splicing ceramic panels, it is easier to assemble and has low process costs.

[0040] The splicing method of the present invention increases the ability of the ceramic panel to resist multiple bullet strikes. Figure 5 As shown, if the projectile is shot from a, the protruding height of the large ceramic block A2 relative to the small ceramic block B increases the penetration path of the projectile. For example, if it hits the edge area of ​​the upper surface of the large ceramic block A2, the ceramic block is easy to change the penetration path of the projectile when it breaks; if it is shot from b, the small ceramic block B3, as the main protection unit, is horizontally arranged to the adjacent two large ceramic blocks A3 and A4 to a certain extent, slowing down the impact energy brought by the projectile and transmitting downward, and vertically to the adjacent large ceramic blocks A2 and A5 to play a restraining role, enhancing the abrasive effect of the ceramic block on the projectile after the ceramic block is broken, consuming the kinetic energy of the projectile, reducing the influence of the projectile-facing area on other areas of the ceramic panel, and improving the overall resistance of the armor plate to multiple projectiles; if it is shot from c, the inclined surface will produce an inclination effect, reacting to the projectile to cause the projectile to deflect and reduce the penetration depth. In addition, the entire ceramic panel is encapsulated with titanium alloy, so that the restraining effect provided by the titanium alloy can ensure that the ceramic material can better exert its anti-ballistic performance, and reduce the probability of secondary damage caused by the splash of the ceramic block after being hit by the bullet.

[0041] The material of the ceramic block can be boron carbide ceramic, titanium boride ceramic, silicon carbide ceramic or alumina ceramic, and can be spliced ​​into a single layer according to specific protection requirements (such as Figure 4 As shown) or multiple layers of closely packed ceramic panels, a single layer of ceramic panels can be made of multiple ceramic materials of different sizes and materials. When designing a multi-layer structure, the height of the trapezoidal ceramic blocks depends on the specific design requirements.

[0042] The first transition layer is composed of five layers of high-performance fiber hybrid composite plates. The high-performance fiber hybrid composite plates are made of aramid / carbon fiber hybrid reinforced polymer matrix composite materials. The relatively high elongation / low modulus aramid fiber is combined with low elongation and high modulus carbon fiber to achieve the complementary advantages of different fibers and improve the impact resistance of the composite armor. The hybrid method can be intra-layer hybrid (two fibers are included in the same layer), inter-layer hybrid (each layer of the laminate contains the same type of fiber) and super hybrid (in addition to different types of fibers, more than one matrix type is used). In this paper, the first transition layer adopts the inter-layer hybrid method to improve the ballistic performance of the transition layer by changing the volume fraction of aramid fiber and carbon fiber.

[0043] The second transition layer is made of Nomex honeycomb panel cast with bismaleimide resin. Figure 7 As shown in the figure, the structure combines the high strength of solid materials with the excellent properties of polyhedral materials, with high specific strength and high specific stiffness, as well as good impact and seismic resistance. The use of BMI resin for casting can improve the overall modulus and dimensional stability of the second transition layer.

[0044] In actual production, it is easy to achieve mass production. Not only can large-sized honeycomb panels be selected for integral casting, and then the panels of the required size can be cut, but also the honeycomb panels of the required size can be cast and prepared. The process is highly controllable and there are no technical difficulties. In addition, the use of this structure, in addition to light weight, high energy absorption and improved armor plate buffering capacity, can also achieve flame retardant and heat absorption functions, reduce the damage caused by the PE backboard, and improve the safety factor of the protected target. At present, the application of casting resin in honeycomb panel structures is relatively small, and the application of this structure in the armor field is a first.

[0045] The back plate is made of ultra-high molecular weight polyethylene fiber (hereinafter referred to as PE fiber) prepreg by hot pressing. PE fiber is spun from polyethylene with a molecular weight of 1 million to 5 million. The molecule is a linear highly oriented straight chain structure. The unique molecular structure gives it excellent physical properties: high specific strength and high specific modulus. At the same time, it has high tensile strength, high elongation at break, large work of fracture, and excellent energy absorption capacity. As a composite armor, the back plate will experience convex deformation, fiber breakage, peeling between fibers, and delamination during the impact penetration process. Among them, the deformation of the back plate caused by tensile action and the tensile breakage of the fibers are the main energy consumption mechanisms. The greater the convex deformation of the PE plate, the higher the energy absorbed. Moreover, as the thickness of the PE plate increases, the energy absorption capacity of the PE plate will increase exponentially.

[0046] The preparation method is as follows:

[0047] 1. According to Figure 2 The size of the medium trapezoidal ceramic block requires the preparation of two ceramic blocks of different sizes, A and B, in order to Figure 3 , Figure 4 The ceramic panels are bonded according to the splicing rules shown in the figure to form ceramic panels. The adhesive can be selected from one of epoxy adhesive, polyurethane adhesive, polyacrylic adhesive or silicone adhesive. Then, the ceramic panels are encapsulated with titanium alloy using casting, powder metallurgy or ceramic metallization methods to form a panel layer. The overall thickness of the panel layer is approximately 22-35mm.

[0048] 2. The first transition layer is composed of five layers of high-performance fiber hybrid composite materials, which are made of aramid / carbon fiber hybrid reinforced polymer-based composite materials. The overall thickness is approximately 1-6 mm. The first layer is close to the bullet-facing surface. The fiber volume fractions of aramid fibers and carbon fibers in each layer are shown in the following table.

[0049]

[0050]

[0051] 3. The second transition layer is prepared by casting bismaleimide resin on the Nomex honeycomb board. The overall thickness of this layer is about 6-12 mm. The resin is cast evenly and the casting thickness is the same as the height of the honeycomb board.

[0052] 4. Use hot melt adhesive film to bond the first transition layer and the panel layer to form a prefabricated part. Add a hot melt adhesive film layer between the two layers. The thickness of the hot melt adhesive film layer is 0.1-0.16mm and the surface density is 110±16g / m 2The material can be one of PU film, EVA film, polyurethane film, thermosetting film, thermoplastic film and phenolic resin film. The preform is placed in a vacuum bag and evacuated to a vacuum state, and then enters an autoclave for staged heating and evacuation, and the preform is obtained after cooling.

[0053] The operation steps are as follows: (1) The first stage time is 15-50 minutes, the vacuum pressure is 0.5-1.8 MPa, and the temperature is 75-110°C; (2) The second stage time is 40-100 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C; (3) The third stage time is 20-70 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C.

[0054] 5. Prepare PE backsheet with a surface density of 80-160g / m 2 The PE prepreg is cut to size, and then layered and hot-pressed. The overall thickness of the backplane is about 8-20mm. The hot-pressing process is as follows: (1) The mold is heated to 60-100℃ and the pressure is 5-15MPa in the first stage; (2) The mold is heated to 100-130℃ and the pressure is 12-18MPa in the first stage; (3) The mold is heated to 130-150℃ and the pressure is 15-25MPa in the first stage. After the three-stage operation is completed, stop heating and pressurizing, keep warm and pressurized for 25-80 minutes, and when the temperature drops to 30-50℃,

[0055] Release the pressure, take out the PE plate, and then cut it using an ultra-high pressure water jet cutting machine.

[0056] The composite armor plate is formed by laying the PE back sheet, the second transition layer and the prefabricated part (with the panel layer facing upward) in sequence, and a hot melt adhesive film is embedded in each bonding surface. The thickness of the hot melt adhesive film layer is 0.1-0.16mm, and the surface density is 110±16g / m 2 The material can be one of PU film, EVA film, polyurethane film, thermosetting film, thermoplastic film, and phenolic resin film. The armor plate is placed in a vacuum bag and evacuated, and then placed in an autoclave for staged heating and evacuation, and then a molded part is obtained after cooling. The operation steps are as follows: (1) The first stage time is 15-50 minutes, the vacuum pressure is 1-1.5 MPa, and the temperature is 75-110°C; (2) The second stage time is 40-100 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C; (3) The third stage time is 20-70 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite armor plate comprising titanium alloy encapsulated and spliced ​​ceramic panels, characterized in that: It includes a panel layer, a first transition layer, a second transition layer and a PE backboard layer which are sequentially stacked and connected; The panel layer is composed of at least one layer of ceramic panel encapsulated by titanium alloy. Each layer of ceramic panel is composed of a plurality of ceramic blocks divided into large ceramic blocks and small ceramic blocks. The large and small ceramic blocks are both isosceles trapezoidal hexahedrons, and the facades on the front and rear sides are both isosceles trapezoidal, and the top, bottom, left and right sides are all rectangular. The large and small ceramic blocks have the same inclination angle and thickness, the height of the large ceramic block is greater than the height of the small ceramic block, the length of the top surface length side of the large ceramic block is greater than the length of the top surface length side of the small ceramic block, the length of the bottom surface length side of the large ceramic block is greater than the length of the bottom surface length side of the small ceramic block, and the length of the bottom surface length side of the small ceramic block is greater than the length of the top surface length side of the large ceramic block; wherein, the angles between the left and right inclined surfaces and the bottom surface are respectively defined as the inclination angle of the ceramic block, the distance between the front and rear facades is defined as the thickness of the ceramic block, and the distance between the bottom surface and the top surface is defined as the height of the ceramic block; The splicing rules of each layer of ceramic panels are as follows: it is composed of multiple rows of ceramic blocks arranged in sequence along the vertical column, each row of ceramic blocks is composed of multiple large ceramic blocks and small ceramic blocks arranged in sequence along the horizontal row, the top surfaces of the large ceramic blocks in each row are facing upward, and the top surfaces of the small ceramic blocks are facing downward, and the inclined surfaces of the large ceramic blocks in the same row are in contact with the inclined surfaces of the adjacent small ceramic blocks; the bottom surfaces of the large ceramic blocks and the top surfaces of the small ceramic blocks in the same layer are in the same plane; the vertical surfaces of the small ceramic blocks in the same column are in contact with the corresponding vertical surfaces of the adjacent large ceramic blocks, and the angle line of the inclination angle of the small ceramic block is coplanar with the inclined surface of the corresponding side of the adjacent large ceramic block.

2. The composite armor plate comprising titanium alloy encapsulated and spliced ​​ceramic panels according to claim 1, characterized in that: The thickness of the ceramic block ranges from 9 to 21 mm, the length of the length side of the top surface ranges from 15 to 30 mm, the height ranges from 18 to 25 mm, the inclination angle ranges from 48° to 70°, the lengths of the width sides of the top and bottom surfaces are equal, and the length of the length side of the bottom surface is greater than the length of the length side of the top surface.

3. The composite armor plate comprising titanium alloy encapsulated and spliced ​​ceramic panels according to claim 1, characterized in that: The material of the ceramic block is one of boron carbide ceramics, titanium boride ceramics, silicon carbide ceramics or alumina ceramics.

4. The composite armor plate comprising titanium alloy encapsulated and spliced ​​ceramic panels according to claim 1, characterized in that: The first transition layer is composed of five layers of high-performance fiber hybrid composite material plates made of aramid / carbon fiber hybrid reinforced polymer matrix composite materials, and the hybrid method adopts interlayer hybridization; The second transition layer is made of Nomex honeycomb panel cast with bismaleimide resin; The back panel is made of ultra-high molecular weight polyethylene fiber prepreg by hot pressing.

5. A method for preparing a composite armor plate containing titanium alloy encapsulated and spliced ​​ceramic panels, characterized in that: include: The ceramic panel is bonded according to the splicing rule as described in claim 1, and then the ceramic panel is encapsulated with titanium alloy by casting, powder metallurgy or ceramic metallization to form a panel layer, and the overall thickness of the panel layer is 22-35 mm; The first transition layer is composed of five layers of high-performance fiber hybrid composite panels, which are made of aramid / carbon fiber hybrid reinforced polymer matrix composite materials with an overall thickness of 1-6 mm. The first layer is close to the panel layer. The fiber volume fractions of aramid fiber and carbon fiber in each layer are: In the first layer, the fiber volume fractions of carbon fiber and aramid fiber are 59% and 19%, respectively; In the second layer, the fiber volume fractions of carbon fiber and aramid fiber are 51% and 21%, respectively; In the third layer, the fiber volume fractions of carbon fiber and aramid fiber are 45% and 33% respectively; In the fourth layer, the fiber volume fractions of carbon fiber and aramid fiber are 37% and 41% respectively; In the fifth layer, the fiber volume fractions of carbon fiber and aramid fiber are 29% and 49% respectively; The second transition layer is prepared by casting bismaleimide resin on the Nomex honeycomb plate. The overall thickness of this layer is 6-12mm. The resin is cast evenly and the casting thickness is the same as the height of the honeycomb plate. The first transition layer and the panel layer are bonded together using a hot melt adhesive film layer to form a prefabricated part. A hot melt adhesive film layer is added between the two layers. The thickness of the hot melt adhesive film layer is 0.1-0.16mm and the surface density is 110±16g / m 2 The material is one of a thermosetting film and a thermoplastic film; the preform is placed in a vacuum bag and evacuated to a vacuum state, and then enters an autoclave for staged heating and vacuuming, and the operation steps are as follows: (1) the first stage time is 15-50 minutes, the vacuum pressure is 0.5-1.8MPa, and the temperature is 75-110°C; (2) the second stage time is 40-100 minutes, the vacuum pressure is 1.5-4MPa, and the temperature is 90-150°C; (3) the third stage time is 20-70 minutes, the vacuum pressure is 1.5-4MPa, and the temperature is 90-150°C; and then cooled to obtain the final preform; Prepare PE backsheet with a surface density of 80-160g / m 2 The PE prepreg is cut to size, and then layered and hot-pressed. The overall thickness of the backboard is 8-20 mm. The hot-pressing process is as follows: (1) In the first stage, the mold is heated to 60-100 ° C and the pressure is 5-15 MPa; (2) In the second stage, the mold is heated to 100-130 ° C and the pressure is 12-18 MPa; (3) In the third stage, the mold is heated to 130-150 ° C and the pressure is 15-25 MPa; After the three-stage operation is completed, stop heating and pressurizing, keep warm and pressurized for 25-80 minutes, and when the temperature drops to 30-50 ° C, release the pressure and take out the PE board, and then use an ultra-high pressure water jet cutting machine to cut; The composite armor plate is formed by laying the PE back sheet, the second transition layer and the final prefabricated parts with the face sheet facing upwards in the order of laying. A hot melt adhesive film is embedded in each bonding surface. The thickness of the hot melt adhesive film layer is 0.1-0.16mm and the surface density is 110±16g / m 2 , the material is one of thermosetting film and thermoplastic film; The composite armor plate is placed in a vacuum bag as a whole, evacuated, and then placed in an autoclave for staged heating and evacuation, and a molded part is obtained after cooling. The operation steps are as follows: (1) The first stage lasts 15-50 minutes, the vacuum pressure is 1-1.5 MPa, and the temperature is 75-110°C; (2) The second stage lasts 40-100 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C; (3) The third stage lasts 20-70 minutes, the vacuum pressure is 1.5-4 MPa, and the temperature is 90-150°C.

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