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A kind of preparation method of composite coating for lightweight composite armor ceramics

A composite coating and armor technology, applied in coating, metal material coating process, transportation and packaging, etc., can solve the problems of insignificant ceramic toughening effect, limited adhesive strength of adhesive film, poor ceramic crack arrest effect, etc. , to achieve the effect of improving the anti-penetration ability, increasing the crack extension area, and strong design.

Active Publication Date: 2021-10-01
中航装甲科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of microstructure adjustment on the toughening of ceramics is not obvious; the toughness of prepared ceramic matrix composites is improved, but the hardness is reduced, which weakens its ability to destroy projectiles
In addition, researchers also apply three-dimensional constraints to ceramics to arrest cracks. A common method is to coat the entire composite armor with an aramid crack arrester layer through the autoclave process, so as to achieve the purpose of restraining ceramics. However, the adhesive film The bonding strength is limited, and the crack arrest effect on ceramics is poor; in addition, researchers have prepared alloy layers through investment casting technology to impose constraints on ceramics, but its structure and performance are single, and the film layer is too thin, and the confinement effect is poor. If it is too thick, the weight will increase

Method used

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  • A kind of preparation method of composite coating for lightweight composite armor ceramics
  • A kind of preparation method of composite coating for lightweight composite armor ceramics
  • A kind of preparation method of composite coating for lightweight composite armor ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1)B 4 C The ceramic substrate is roughened by sandblasting

[0060] The sandblasting pressure is 0.5MPa, the sand grain is brown corundum, the particle size is 80 mesh, the sandblasting distance is 20cm, the sandblasting angle is 45°, and the sandblasting time is 5s.

[0061] (2) B after blasting 4 C The ceramic substrate is treated with floating dust on the surface, and the surface is cleaned with ultrasonic waves and dried;

[0062] (3) Preparation of spraying raw materials

[0063] Preparation of Ti / Al Composite Powder

[0064] Mix Ti powder (particle size 8 μm) and Al powder (particle size 55 μm) according to a mass ratio of 3:7 to obtain a mixed powder; according to the mixed powder: water: sodium hydroxymethyl cellulose glue mass ratio 2:2: The ratio of 1 is fully mixed to obtain a slurry suspension; add 1% polyethylene oxide dispersant of the mixed powder mass to the slurry suspension, and stir for 3 hours to obtain a uniform slurry suspension; the uniform s...

Embodiment 2

[0074] (1)B 4 C The ceramic substrate is roughened by sandblasting

[0075] The sandblasting pressure is 0.6MPa, the sand grain is brown corundum, the particle size is 60 mesh, the sandblasting distance is 30cm, the sandblasting angle is 90°, and the sandblasting time is 10s.

[0076] (2) B after blasting 4 C The ceramic substrate is treated with floating dust on the surface, and the surface is cleaned with ultrasonic waves and dried;

[0077] (3) Preparation of spraying raw materials

[0078] Preparation of Ti / Al Composite Powder

[0079] Mix Ti powder (10 μm in particle size) and Al powder (45 μm in particle size) according to the mass ratio of 3:7 to obtain mixed powder; according to mixed powder: water: sodium hydroxymethyl cellulose glue mass ratio 2:2: The ratio of 1 is fully mixed to obtain a slurry suspension; add 2% polyoxyethylene dispersant of the mixed powder mass to the slurry suspension, stir for 4 hours, and obtain a uniform slurry suspension; mix the unifor...

Embodiment 3

[0089] (1)B 4 C The ceramic substrate is roughened by sandblasting

[0090] The sandblasting pressure is 0.5MPa, the sand grain is brown corundum, the particle size is 70 mesh, the sandblasting distance is 25cm, the sandblasting angle is 60°, and the sandblasting time is 8s.

[0091] (2) B after blasting 4 C The ceramic substrate is treated with floating dust on the surface, and the surface is cleaned with ultrasonic waves and dried;

[0092] (3) Preparation of spraying raw materials

[0093] Preparation of Ti / Al Composite Powder

[0094] Ti powder (particle size 9 μm) and Al powder (particle size 50 μm) are mixed according to a mass ratio of 1:5 to obtain a mixed powder; according to the mixed powder: water: sodium hydroxymethyl cellulose glue mass ratio 2:2: The ratio of 1 is fully mixed to obtain a slurry suspension; add 2% polyoxyethylene dispersant of the mixed powder mass to the slurry suspension, stir for 3 hours, and obtain a uniform slurry suspension; mix the unif...

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Abstract

The invention provides a kind of preparation method of composite coating for lightweight composite armor ceramics, comprising: Step 1: B 4 C ceramic substrate is subjected to sandblasting roughening treatment; Step 2: B after sandblasting 4 C The surface of the ceramic substrate is treated with floating dust, and the surface is cleaned with ultrasonic waves, and dried; Step 3: Put the prepared spraying materials in a drying oven, 150‑200 ° C, and keep warm for 1‑2h; Step 4: Use supersonic flame spraying method Or plasma spraying method to spray Ti / Al transition layer, TiN tough layer, TiCN / diamond hard layer and Cu low melting point layer sequentially. The invention is in B 4 Four coatings are formed on the C ceramic substrate. When the substrate is impacted by a penetrating bomb, the low melting point Cu coating on the surface of the gradient coating melts and sticks to the surface of the warhead, increasing the impact resistance of the warhead and improving the penetration resistance.

Description

technical field [0001] The invention relates to a method for preparing a composite coating for lightweight composite armor ceramics, and belongs to the technical field of preparation of ceramic surface coatings. Background technique [0002] In the lightweight composite armor structure, high-hardness ceramics are generally used as the facing surface, so as to destroy the warhead and increase the force-bearing area of ​​the warhead. Boron carbide (B 4 C) Commonly known as artificial diamond, it has low density (relative density 2.52) and high hardness (29GPa), which is an excellent choice for the preparation of lightweight composite armor. But its low toughness (3.2GPa / m 2 ) makes it fragmented after being impacted by the projectile, and does not have the ability to resist multiple blows. [0003] In order to improve its toughness and improve its protective performance, researchers have carried out work on its microstructure and preparation of ceramic matrix composites. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/129C23C4/134C23C4/08C23C4/10C23C4/02B22F1/00B22F1/02
CPCC23C4/129C23C4/134C23C4/08C23C4/10C23C4/02B22F1/052B22F1/17B22F1/10
Inventor 米鹏博田歌宋磊磊魏成霖
Owner 中航装甲科技有限公司
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