Metal-ceramic gradient composite armor and manufacturing method thereof

An armor and gradient technology, applied in armor, protective equipment, ceramic molding machines, etc., can solve the impact of composite armor on the ability to resist multiple bullets, the mismatch of sound resistance between layers and stress concentration, and the cracking of the bonding surface of the panel and the back panel, etc. problem, to achieve the effect of solving the problem of bond strength, simple manufacturing process, and improving the protection factor

Inactive Publication Date: 2020-03-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, this kind of laminated composite structure through simple bonding, on the one hand, due to the large differences in hardness, elastic modulus, density, toughness, etc. at the bonding interface of different materials, the acoustic resistance mismatch between layers and stress concentration
The reflected tensile wave and transverse shear stress decomposed by the incident pressure wave at the interface lead to further breakage of the ceramic panel, and what is more serious is that there will be a large area of ​​obvious cracking and delamination on the bonding surface of the panel and the back plate
As a result, the ability of the composite armor to resist multiple bullets is greatly affected.
On the other hand, the lack of peripheral restraint measures in the ceramic composite armor greatly reduces the armor's ability to resist caving

Method used

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  • Metal-ceramic gradient composite armor and manufacturing method thereof
  • Metal-ceramic gradient composite armor and manufacturing method thereof
  • Metal-ceramic gradient composite armor and manufacturing method thereof

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preparation example Construction

[0030] Such as figure 2 , the preparation method of the gradient composite armor of the metal casting ceramic ball of the present invention, comprises the following steps:

[0031] (1) Ceramic surface pretreatment stage:

[0032] 1. Degreasing: After soaking in anhydrous ethanol solution for 15 minutes, place the ceramic ball in deionized water for ultrasonic cleaning for 10 minutes and dry naturally.

[0033] 2. Coarsening: Use analytical pure hydrofluoric acid and distilled water to prepare a HF solution with a mass fraction of 25%, and soak ceramic balls in it for 30 minutes for roughening treatment.

[0034] 3. Sensitization: with SnCl-containing 2 ·H 2 Soak in the sensitizing solution of O and HCl at room temperature for 5 minutes.

[0035] 4. Activation: with PdCl-containing 2 Soak in the activation solution of HCl for 3 minutes.

[0036] 5. Reduction: use NaH 2 PO 2 ·H 2 Soak in the reducing solution of O for 2 minutes to reduce the residual Pd on the surface ...

Embodiment 1

[0050] Soak silicon carbide ceramic balls with diameters of 5mm, 4mm, 3mm, and 2mm in absolute ethanol solution for 15 minutes to remove oil, then place them in deionized water for ultrasonic cleaning for 10 minutes and dry naturally. Use analytical pure hydrofluoric acid and distilled water to prepare a HF solution with a mass fraction of 25%, and soak ceramic balls in it for 30 minutes for roughening treatment. with SnCl 2 ·H 2 Soak in the sensitizing solution of O and HCl at room temperature for 5 minutes. with PdCl 2 Soak in the activation solution of HCl for 3 minutes. with NaH 2 PO 2 ·H 2 Soak in the reducing solution of O for 2min. After washing with deionized water, let it dry naturally. Take an appropriate amount of silver paste and apply it on the screen printing plate, place the ceramic ball under the screen printing plate, and use a brush to evenly print the silver paste on the surface of the ceramic ball through the screen. Place the printed ceramic balls...

Embodiment 2

[0060] Alumina ceramic balls with diameters of 20 mm and 19 mm were soaked in absolute ethanol solution for 15 minutes to remove oil, then placed in deionized water for ultrasonic cleaning for 10 minutes and dried naturally. Use analytical pure hydrofluoric acid and distilled water to prepare a solution with a mass fraction of 25% HF, and soak the ceramic balls in it for 30 minutes for roughening treatment. with SnCl 2 ·H 2 Soak in the sensitizing solution of O and HCl at room temperature for 5 minutes. with PdCl 2 Soak in the activation solution of HCl for 3 minutes. with NaH 2 PO 2 ·H 2 Soak in the reducing solution of O for 2min. After washing with deionized water, let it dry naturally. Take an appropriate amount of silver paste and apply it on the screen printing plate, place the ceramic ball under the screen printing plate, and use a brush to evenly print the silver paste on the surface of the ceramic ball through the screen. Place the printed ceramic balls in an...

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Abstract

The invention discloses a metal-ceramic gradient composite armor and a manufacturing method thereof, and belongs to the technical field of armors. The composite armor is formed by metal cast ceramic balls which are densely arranged from a bullet receiving surface to a bullet back surface in a volume gradient reduction mode; the diameter difference of adjacent two rows of the ceramic balls is 1 mm,and the thicknesses of the ceramic balls account for 2 / 3 of the total thickness of the composite armor. The manufacturing method for the armor comprises a ceramic surface pretreatment stage, a ceramic surface silver-plating stage, a metal suction casting preparation stage, a gradient casting manufacturing stage, and a cooling and de-moulding stage. The structure of the laminated composite armor is optimized, so that acoustic resistance mismatch and stress focus among interface layers of the laminated composite armor can be alleviated, firm peripheral restraining of the ceramic balls can be realized, potsherds are prevented from being avoided, bullet resisting ability, especially multi-bullet resisting ability, of the composite armor is greatly improved.

Description

technical field [0001] The invention relates to a metal-ceramic gradient composite armor and a preparation method thereof, in particular to the preparation of a gradient composite armor of metal casting ceramic balls with functional gradients and density gradients, belonging to the technical field of armor. Background technique [0002] Traditional ceramic composite armor mainly uses ceramics as the face plate, metal or fiber as the back plate, and the two are glued together. This application form takes into account the advantages of the two materials and avoids their respective disadvantages. That is, the high hardness and high elastic modulus of ceramics are used to achieve the penetration resistance of the armor, and the ductility and toughness of metal or fiber are used to achieve the impact resistance and anti-caving ability of the armor. The face plate can break and abrade the passivation projectile, and the back plate can capture ceramic fragments and residual shrapn...

Claims

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Application Information

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IPC IPC(8): F41H5/04B28B1/00
CPCB28B1/008F41H5/0421
Inventor 赖建中曹进峰陈光周捷航李沛
Owner NANJING UNIV OF SCI & TECH
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