Staggered-joint interconnection ceramic mortise and tenon joint splicing structure and preparation method thereof

Abstract

The invention relates to the technical field of ceramic mortise and tenon joint splicing, and particularly discloses a staggered joint interconnection ceramic mortise and tenon joint splicing structure which comprises a ceramic splicing unit a and a ceramic splicing unit b, a plurality of tenon structures and mortise structures are fixedly arranged on the two ceramic splicing units, the splicing faces where the tenon structures are located are matched with the splicing faces where the mortise structures are located, and through staggered joint splicing between the tenon structures and the mortise structures, the tenon structures and the mortise structures are mutually matched. And mutual constraint in multiple directions is formed. The ceramic anti-elastic plate designed by the invention is formed by splicing the tenon-and-mortise structures, the internal ceramic splicing blocks are connected in a staggered joint manner and are mutually restrained, and the external part is a complete plate surface, so that the problems that in the prior art, the ceramic plate loses efficacy and the anti-elastic effect is weakened due to adhesive failure at the splicing joints are solved, the overall protection effect is improved, and the production and manufacturing cost is also reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic mortise and tenon joints, and in particular to a staggered interconnected ceramic mortise and tenon joint structure and a preparation method thereof. Background Art

[0002] Ceramic materials, as important bulletproof materials, play an indispensable role in the field of armor protection. When hit by a projectile, the ceramic bullet-proof plate mainly relies on its own high hardness and the formed broken cone to damage the projectile. It can also absorb part of the projectile impact kinetic energy through fracture and fragmentation. Limited by the preparation process and preparation quality, large-sized ceramic bullet-proof plates are usually difficult to achieve complete-size integrated preparation. Traditional large-sized ceramic bullet-proof plates generally need to first prepare a plurality of small-sized ceramic splicing units with regular shapes, such as square, hexagonal and other polygonal ceramic plates, and then use a specific process to splice and package the small-sized ceramic splicing units to meet the overall size requirements. However, the ceramic splicing units used in traditional processes often form through-splicing seams. When the seams are hit by projectiles, the ceramic splicing units are prone to debonding and separation, weakening the bullet-proof effect of the seams. Secondly, the ceramic splicing units of traditional large-size ceramic bullet-proof plates are mostly connected or encapsulated by bonding, and the joints are mostly in contact with each other or coated with adhesives. Due to the limited bonding strength of the adhesive, it is easy to debond or fail when hit by a penetrating object, providing a priority path for the fracture expansion of the ceramic bullet-proof plate, which is not conducive to the ceramic's damage to the projectile and energy absorption.

[0003] Therefore, the splicing structure design of ceramic bullet-resistant plates should avoid the occurrence of ceramic splicing through-type cracks. At the same time, the splicing units should realize mutual constraints to enhance the bonding effect between the splicing units, strengthen the protection of weak points, reduce damage, and further enhance the overall bullet-resistant effect. Summary of the Invention

[0004] To solve the above problems, the present invention provides a staggered interconnected ceramic mortise and tenon splicing structure, which includes a ceramic splicing unit a and a ceramic splicing unit b, and the splicing surface shapes of the ceramic splicing unit a and the ceramic splicing unit b are adapted to each other.

[0005] In the ceramic mortise and tenon splicing structure of the present invention, a plurality of mortise and tenon structures are fixedly provided on the ceramic splicing unit a and the ceramic splicing unit b, and the shapes of the mortise and tenon structures are rectangular, fan-shaped or other irregular shapes, and the cross-sectional thickness of the mortise and tenon structures is the same as that of the mortise and tenon structures, and the thickness range is 10mm~40mm; the mortise and tenon splicing structure realizes the staggered interconnection of the ceramic splicing units through the splicing between the mortise and tenon structures, forming mutual constraints in multiple directions, wherein the staggered interconnection refers to the staggered and tortuous splicing seams between the ceramic splicing units, rather than straightly passing through the ceramic bullet-resistant plate; the material of the ceramic splicing unit a and the ceramic splicing unit b is a bullet-resistant ceramic plate (or sheet) or a composite ceramic plate (or sheet) with excellent performance, and the bullet-resistant ceramic plate includes alumina, silicon carbide, boron carbide and boron nitride materials; the side length of the ceramic splicing unit a and the ceramic splicing unit b is 50mm~500mm, and the thickness is 20mm~60mm.

[0006] The present invention provides a method for preparing a staggered interconnected ceramic mortise and tenon joint structure, comprising the following steps: S1: Use high-purity graphite to process and prepare the die and the indenter. The shape of the die is the shape of the mortise and tenon joint of the ceramic splicing unit a and the ceramic splicing unit b. The shape of the indenter is a square, and its side length is the same as the side length of the ceramic splicing unit a and the ceramic splicing unit b. S2: The ceramic powder and sintering aid are fully mixed and filled into a concave mold, and the powder is pre-pressed by a graphite indenter to obtain a preform; S3: Sintering the preform into a material, demoulding to obtain ceramic splicing unit a and ceramic splicing unit b, the sintering method can be hot pressing sintering, pressureless sintering or spark plasma sintering; S4: assembling the plurality of ceramic splicing units a and ceramic splicing units b prepared by sintering to a required size through mortise and tenon joints, and encapsulating them with adhesive film, glass or aramid fiber cloth.

[0007] Specifically, the bonding strength can be strengthened by applying adhesive on the fitting surface and joint seams of the mortise and tenon joint structure or by applying adhesive film on the entire outside, wherein the adhesive is one or a combination of epoxy resin adhesive, polyurethane adhesive or acrylic adhesive; and the adhesive film is EVA hot melt adhesive film, TPU hot melt adhesive film or epoxy resin adhesive film.

[0008] The beneficial effects of the present invention are as follows: 1. The ceramic bullet-resistant plate designed in the present invention is spliced ​​together by a mortise and tenon structure. The internal ceramic blocks are staggered and interconnected, and constrained with each other. The external plate surface is complete and has no splicing gaps. This design eliminates the through-type splicing seams, avoids the problem of adhesive debonding and failure or weakening of the bullet-resistant effect of the current ceramic bullet-resistant plate at the splicing seams, and significantly improves the overall protective effect.

[0009] 2. The ceramic bullet-resistant plate of the present invention has a reasonable structural design. The use requirements can be met by staggering the mortise and tenon structure ceramic splicing units with a certain thickness. Compared with the traditional preparation process of staggered stacking and multi-layer bonding of multiple layers of thin ceramic blocks, the process of the present invention is simple to operate and reduces manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of a ceramic bullet-resistant plate with a ceramic mortise and tenon joint structure according to the present invention; Figure 2 Schematic diagram of the ceramic splicing unit a of the present invention; Figure 3 Schematic diagram of the ceramic splicing unit b of the present invention; Figure 4 This is a schematic diagram of the assembly of the ceramic mortise and tenon joint structure of the present invention; Figure 5 Schematic diagram of the assembly of the ceramic mortise and tenon joint structure with fan-shaped joint surfaces in an embodiment of the present invention.

[0011] The numbers of the parts are: 1. Ceramic splicing unit a, 2. Ceramic splicing unit b. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Example

[0013] A staggered interconnected ceramic mortise and tenon joint structure, such as Figures 1 to 4 As shown, the ceramic mortise and tenon joint structure includes a ceramic joint unit a1 and a ceramic joint unit b2, and the shapes of the joint surfaces of the ceramic joint unit a1 and the ceramic joint unit b2 are adapted to each other.

[0014] In this embodiment, the tenon structure (convex part) of the ceramic splicing unit a1 and the mortise structure (concave part) of the ceramic splicing unit b2 complement each other, and their shapes are rectangular. The two ceramic splicing units are assembled together through the tenon and mortise joints. The schematic diagram of the tenon and mortise joints of the ceramic splicing unit a1 and the ceramic splicing unit b2 is shown in FIG. Figure 4 Among them, one quarter of each ceramic splicing unit and the remaining three quarters are staggered and interconnected, forming mutual constraints in multiple directions within the ceramic splicing unit.

[0015] Furthermore, the ceramic splicing units a1 and b2 are squares with the same side length and thickness, and the cross-sectional shape of the mortise and tenon structure is rectangular. The dimensions, thickness, splicing surface shape, and cross-sectional shape of the ceramic splicing units can be designed and adjusted according to protection requirements.

[0016] Furthermore, the materials of the ceramic splicing units a1 and b2 can be adjusted according to the protection objects, and can be various bullet-resistant ceramic plates (or sheets) such as alumina, silicon carbide, boron carbide and boron nitride, or can be composite ceramic plates (or sheets) with excellent performance. Example

[0017] A staggered interconnected ceramic mortise and tenon joint structure, such as Figure 5 As shown, the ceramic mortise and tenon joint structure includes a ceramic joint unit a1 and a ceramic joint unit b2 with fan-shaped joint surfaces, and the shapes of the joint surfaces of the ceramic joint unit a1 and the ceramic joint unit b2 are adapted to each other.

[0018] In this embodiment, the tenon structure (convex part) of the ceramic splicing unit a1 and the mortise structure (concave part) of the ceramic splicing unit b2 complement each other, and their shape is fan-shaped. The two ceramic splicing units are assembled together through the tenon and mortise splicing. The schematic diagram of the tenon and mortise splicing of the ceramic splicing unit a1 and the ceramic splicing unit b2 is shown in FIG. Figure 5 Among them, one quarter of each ceramic splicing unit and the remaining three quarters are staggered and interconnected, forming mutual constraints in multiple directions within the ceramic splicing unit.

[0019] Furthermore, the ceramic splicing units a1 and b2 are squares with the same side length and thickness, and the cross-sectional shape of the mortise and tenon structure is fan-shaped. The dimensions, thickness, splicing surface shape, and cross-sectional shape of the ceramic splicing units can be designed and adjusted according to protection requirements.

[0020] Furthermore, the materials of the ceramic splicing units a1 and b2 can be adjusted according to the protection objects, and can be various bullet-resistant ceramic plates (or sheets) such as alumina, silicon carbide, boron carbide and boron nitride, or can be composite ceramic plates (or sheets) with excellent performance.

[0021] The preparation method of the staggered interconnected ceramic mortise and tenon joint structures of Examples 1 and 2 is as follows: S1: Use high-purity graphite to process and prepare the die and the indenter. The shape of the die is the shape of the mortise and tenon joint of the ceramic splicing unit a1 and the ceramic splicing unit b2. The shape of the indenter is a square, and its side length is the same as the side length of the ceramic splicing unit a1 and the ceramic splicing unit b2. S2: The ceramic powder and sintering aid are fully mixed and filled into a concave mold, and the powder is pre-pressed by a graphite indenter to obtain a preform; S3: Sintering the preform into a material, demoulding to obtain the ceramic splicing unit a1 and the ceramic splicing unit b2, the sintering method can be hot pressing sintering, pressureless sintering or spark plasma sintering; S4: assembling the plurality of ceramic splicing units a1 and the ceramic splicing units b2 prepared by sintering to a required size through mortise and tenon joints, and encapsulating them with adhesive film, glass or aramid fiber cloth.

[0022] Furthermore, the bonding strength can be strengthened by applying adhesive on the fitting surface and joint seams of the mortise and tenon joint structure or by applying adhesive film on the entire outside, wherein the adhesive is one or a combination of epoxy resin adhesive, polyurethane adhesive or acrylic adhesive; and the adhesive film is EVA hot melt adhesive film, TPU hot melt adhesive film or epoxy resin adhesive film.

[0023] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A staggered interconnected ceramic mortise and tenon joint structure, characterized in that: The ceramic mortise and tenon joint structure comprises a ceramic joint unit a (1) and a ceramic joint unit b (2), wherein the shapes of the joint surfaces of the ceramic joint unit a (1) and the ceramic joint unit b (2) are adapted to each other.

2. The staggered interconnected ceramic mortise and tenon joint structure according to claim 1, characterized in that: The ceramic splicing unit a (1) and the ceramic splicing unit b (2) are fixedly provided with a plurality of tenon structures and mortise structures, the shapes of the tenon structures and the mortise structures are rectangular, fan-shaped or other irregular shapes, and the cross-sectional thickness of the tenon structures and the mortise structures is the same, and the thickness ranges from 10 mm to 40 mm.

3. The staggered interconnected ceramic mortise and tenon joint structure according to claims 1 and 2, characterized in that: The mortise and tenon joint structure forms mutual constraints in multiple directions through staggered joints between the mortise structure and the tenon structure.

4. The staggered interconnected ceramic mortise and tenon joint structure according to claim 1, characterized in that: The ceramic splicing unit a (1) and the ceramic splicing unit b (2) are made of a bullet-resistant ceramic plate or a multiphase ceramic plate. The bullet-resistant ceramic plate includes aluminum oxide, silicon carbide, boron carbide and boron nitride.

5. The staggered interconnected ceramic mortise and tenon joint structure according to claim 1, characterized in that: The side length of the ceramic splicing unit a (1) and the ceramic splicing unit b (2) is 50 mm to 500 mm, and the thickness is 20 mm to 60 mm.

6. A method for preparing a staggered interconnected ceramic mortise and tenon joint structure according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: High-purity graphite is used to process and prepare a die and a pressing head. The shape of the die is the shape of the mortise and tenon joint surface of the ceramic splicing unit a (1) and the ceramic splicing unit b (2). The shape of the pressing head is a square, and the side length thereof is the same as the side length of the ceramic splicing unit a (1) and the ceramic splicing unit b (2); S2: The ceramic powder and sintering aid are fully mixed and filled into a concave mold, and the powder is pre-pressed by a graphite indenter to obtain a preform; S3: sintering the preform into a material, demoulding to obtain the ceramic splicing unit a (1) and the ceramic splicing unit b (2), the sintering method can be hot pressing sintering, pressureless sintering or spark plasma sintering; S4: assembling the plurality of ceramic splicing units a (1) and the ceramic splicing units b (2) prepared by sintering by mortise and tenon joints to a required size, and encapsulating them by means of adhesive film, glass or aramid fiber cloth.

7. The method for preparing a staggered interconnected ceramic mortise and tenon joint structure according to claim 6, characterized in that: The bonding surface and the joint seam of the mortise and tenon joint structure are strengthened by coating adhesive or coating the entire exterior with an adhesive film.

8. The method for preparing a staggered interconnected ceramic mortise and tenon joint structure according to claim 7, characterized in that: The adhesive is one or a combination of epoxy resin adhesive, polyurethane adhesive or acrylic adhesive; the adhesive film is EVA hot melt adhesive film, TPU hot melt adhesive film or epoxy resin adhesive film.

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