Ballistic-resistant ceramic plate

Abstract

The utility model discloses a bulletproof ceramic plate which is made of a main ceramic plate made of a whole piece of ceramic, characterized in that it further comprises an adhesive layer and a spliced ceramic plate, the adhesive layer is used to bond the spliced ceramic plate to the main ceramic plate, the spliced ceramic plate comprises a plurality of spliced ceramic pieces, the main ceramic plate is an outer layer plate of the bulletproof ceramic plate and the spliced ceramic plate is an inner layer plate of the bulletproof ceramic plate, or the spliced ceramic plate is the outer layer plate of the bulletproof ceramic plate and the main ceramic plate is the inner layer plate of the bulletproof ceramic plate, the Vickers hardness (Hv) of the outer layer plate is greater than that of the inner layer plate, the difference in hardness is not less than 1 GPa, and the hardness of the spliced ceramic plate is the same as that of the single ceramic piece. The outer layer plate with high hardness can resist the impact of a bullet body, and the bulletproof performance is high. The spliced ceramic plate made of small ceramic pieces greatly reduces the cost and weight. After being hit by a bullet body, the spliced ceramic plate is not easily damaged as a whole, and the bulletproof performance is further improved.

Description

Technical Field

[0001] This utility model relates to the field of bulletproof products, and in particular to a bulletproof ceramic plate. Background Technology

[0002] With the advancement of military technology, battlefield personnel and equipment have increasingly higher requirements for their protection levels, leading to the development of ballistic materials, primarily used in body armor, vehicle armor, and aviation. Due to the high hardness and strength of ceramic materials, when a bullet impacts a high-strength, high-hardness ceramic, the bullet becomes blunt or shatters, causing the ceramic to fragment. This process dissipates most of the bullet's energy and forms an inverted pyramid-shaped destruction cone at the point of impact. Currently, many ceramics can be used in ballistic armor, including alumina, silicon carbide, boron carbide, silicon nitride, and titanium boride. Among these, alumina ceramics, silicon carbide ceramics, and boron carbide ceramics are the most widely used. It is generally believed that the greater the hardness of the ceramic material, the better its ballistic protection performance.

[0003] Currently, bulletproof ceramic plates are mainly made of a single piece of ceramic material, and the hardness of the material and the thickness of the plate determine the protection level of the bulletproof ceramic plate. The harder the material used and the thicker the plate, the higher the protection level, the more expensive it is, and the heavier it is. Summary of the Invention

[0004] To address the issues of high price and heavy weight of the aforementioned bulletproof ceramic plates, this invention proposes a bulletproof ceramic plate that reduces cost, lightens weight, and improves bulletproof performance.

[0005] To achieve the above objectives, the bulletproof ceramic plate provided by this utility model includes a main ceramic plate made from a single piece of ceramic. Its characteristic is that it further includes an adhesive layer and splicing ceramic plates. The adhesive layer bonds the splicing ceramic plates to the main ceramic plate. The splicing ceramic plates include several spliced ​​ceramic pieces. The main ceramic plate serves as the outer layer of the bulletproof ceramic plate, and the splicing ceramic plates serve as the inner layer; or the splicing ceramic plates serve as the outer layer of the bulletproof ceramic plate, and the main ceramic plate serves as the inner layer. The Vickers hardness (Hv) of the outer layer is greater than that of the inner layer, and the hardness difference is not less than 1 GPa (102 kgf / (mm²)). 2 The hardness of the spliced ​​ceramic plate is the same as the hardness of a single ceramic plate.

[0006] The bulletproof ceramic plate provided by this utility model has a main ceramic plate made of a large-sized solid ceramic piece, with spliced ​​ceramic plates separately set from the main ceramic plate. The outer plate with high hardness is used to resist the impact of the projectile, resulting in high bulletproof performance. Compared with a solid ceramic plate of the same thickness, the spliced ​​ceramic plate made of small ceramic pieces has little difference in bulletproof performance, but greatly reduces costs and weight. After being hit by a projectile, the spliced ​​ceramic plate is less likely to be severely damaged as a whole, further improving the bulletproof performance. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of the bulletproof ceramic plate of this utility model;

[0008] Figure 2 This is a cross-sectional view of the bulletproof ceramic plate.

[0009] The present invention will now be described in further detail with reference to the accompanying drawings. Detailed Implementation

[0010] See Figure 1 and Figure 2 The bulletproof ceramic plate includes a main ceramic plate 1, an adhesive layer, and splicing ceramic plates 2. The main ceramic plate 1 is a one-piece structure made from a single piece of ceramic, and the material can be silicon carbide, boron carbide, silicon nitride, or titanium boride, etc. The main ceramic plate 1 is arc-shaped, specifically corresponding to the arc shape of the human body, allowing it to conform well to the body and be used to create close-fitting bulletproof products, enhancing body protection. The main ceramic plate 1 includes two arc-shaped walls: an inner arc-shaped wall and an outer arc-shaped wall, with the inner arc-shaped wall having a smaller radius. The adhesive layer bonds the splicing ceramic plates 2 to the inner arc-shaped wall of the main ceramic plate 1; the adhesive layer is preferably epoxy resin. The splicing ceramic plates 2 include several spliced ​​ceramic pieces 21, each with the same thickness, spliced ​​together to form a splicing ceramic plate 2 of uniform thickness. The thickness of a single ceramic piece 21 determines the thickness of the splicing ceramic plate 2. The ceramic piece 21 has a regular hexagonal cross-section. This hexagonal shape allows it to be closely arranged with the surrounding six ceramic pieces, resulting in smaller seams and a higher probability that the impact point will land on the ceramic piece rather than the seam when struck at a single point, thus providing excellent ballistic protection. The ceramic piece can also be square or rectangular. The material of the ceramic piece can be silicon carbide, boron carbide, silicon nitride, or titanium boride, among other ceramic materials. During manufacturing, a layer of epoxy resin is applied to the inner curved wall of the main ceramic plate 1, and then the individual ceramic pieces 31 are adhered to it. Where individual or half-piece ceramic pieces cannot be adhered at the edges, other materials can be used to fill the gaps, ensuring that the spliced ​​ceramic plate 2 completely covers the main ceramic plate 1.

[0011] In use, the outermost layer of the bulletproof ceramic plate is the first to be impacted by the projectile. In this example, the main ceramic plate 1 is the outermost layer of the bulletproof ceramic plate, and the spliced ​​ceramic plate 2 is the innermost layer. The Vickers hardness (Hv) of the main ceramic plate 1, which serves as the outermost layer, is greater than that of the spliced ​​ceramic plate 2, which serves as the innermost layer. The preferred hardness difference is not less than 1 GPa (102 kgf / (mm²)). 2The hardness of the spliced ​​ceramic plate 2 is the same as that of a single ceramic sheet. The main ceramic plate 1 is a 4-5mm thick hyperboloidal monolithic plate, composed of boron carbide with added diamond powder, and has a Vickers hardness (Hv) of 90-110 GPa. The ceramic sheet 21 of the spliced ​​ceramic plate 2 is 2-5mm thick, made of silicon carbide or boron carbide, with a Vickers hardness (Hv) of 24-30 GPa, and has a regular hexagonal cross-section.

[0012] In another embodiment, several ceramic sheets can be pasted onto the outer arc-shaped wall surface of the main ceramic plate. The spliced ​​ceramic plate serves as the outer layer of the bulletproof ceramic plate, while the main ceramic plate serves as the inner layer. The Vickers hardness (Hv) of the spliced ​​ceramic plate, which serves as the outer layer, is greater than that of the main ceramic plate, which serves as the inner layer. The preferred hardness difference is not less than 1 GPa (102 kgf / (mm)). 2 The hardness of the spliced ​​ceramic plate is the same as that of a single ceramic plate.

[0013] The main ceramic plate is not limited to a curved shape; it can also be a single flat plate. The spliced ​​ceramic plates are glued onto one of the planes of the main ceramic plate, and the resulting bulletproof ceramic plate products can be used for vehicle armor.

[0014] The bulletproof ceramic plate provided by this utility model features a main ceramic plate made of a large, single piece of ceramic. The spliced ​​ceramic plates are separate from the main ceramic plate. A high-hardness outer layer plate directly resists the impact of the projectile. The projectile's energy is significantly reduced after being dissipated by the outer layer plate. The inner layer plate, with a lower hardness than the outer layer plate, perfectly matches the reduced energy of the projectile. Compared to existing one-piece ceramic plates of the same thickness but with the same hardness as the outer layer plate of this utility model, the bulletproof performance of this utility model's bulletproof ceramic plate is not significantly different. However, because the inner layer plate is much lower in hardness than the outer layer plate, the cost and weight are greatly reduced. In other words, to achieve the same level of protection, this utility model is cheaper and lighter than existing one-piece ceramic plates. Compared to a one-piece ceramic plate of the same thickness, the spliced ​​ceramic plate, made of small ceramic pieces, has a similar bulletproof performance but significantly lower costs and lighter weight. After being hit by a projectile, the spliced ​​ceramic plate is less likely to be severely damaged as a whole, further improving its bulletproof performance.

Claims

1. A bulletproof ceramic plate, comprising a main ceramic plate made from a single piece of ceramic, characterized in that, It also includes an adhesive layer and splicing ceramic plates. The adhesive layer bonds the splicing ceramic plates to the main ceramic plate. The splicing ceramic plates consist of several spliced ​​ceramic pieces. The main ceramic plate is the outer layer of the bulletproof ceramic plate and the splicing ceramic plates are the inner layer of the bulletproof ceramic plate, or the splicing ceramic plates are the outer layer of the bulletproof ceramic plate and the main ceramic plate is the inner layer of the bulletproof ceramic plate. The Vickers hardness of the outer layer is greater than that of the inner layer, and the hardness difference is not less than 1 GPa. The hardness of the splicing ceramic plate is the hardness of a single ceramic piece.

2. The bulletproof ceramic plate according to claim 1, characterized in that, The main ceramic plate is arc-shaped, and the spliced ​​ceramic plate is pasted on the arc-shaped wall surface of the main ceramic plate.

3. The bulletproof ceramic plate according to claim 2, characterized in that, The main ceramic plate is the outer layer of the bulletproof ceramic plate, and the spliced ​​ceramic plates are bonded to the inner arc-shaped wall surface of the main ceramic plate.

4. The bulletproof ceramic plate according to claim 3, characterized in that, The ceramic sheet has a regular hexagonal, square, or rectangular structure.

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