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.
CN111139421BActive Publication Date: 2021-10-01中航装甲科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
中航装甲科技有限公司
Publication Date
2021-10-01

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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.
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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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