A 600°C radar- and infrared-compatible stealth coating and its preparation method

Abstract

The invention discloses a radar- and infrared-compatible stealth coating capable of withstanding a temperature of 600°C. The stealth coating is located on the surface of a metal substrate, starting from the surface of the metal substrate, and sequentially including an adhesive layer, 8YSZ‑Al 2 o 3 Ceramic bottom layer, high-temperature resistance coating, 8YSZ isolation layer and high-temperature conductor coating; the high-temperature resistance coating and high-temperature conductor coating are all in the form of patches, and the patches are arranged periodically. The invention also discloses a specific preparation method of the stealth coating. The coating structure proposed by the present invention has radar and infrared compatible stealth functions. Due to the introduction of a resistive periodic structure, it can have better wave-absorbing performance, breaking through the unsatisfactory wave-absorbing performance caused by the addition of absorbents in traditional wave-absorbing coatings. , Insufficient impact on the process and unstable performance; the surface layer introduces a conductive periodic structure, and uses its high reflection in the infrared band and high transmission in the radar band to realize the radar and infrared compatible stealth function.

Description

technical field [0001] The invention belongs to the field of radar and infrared compatible stealth materials, in particular to a radar and infrared compatible stealth coating capable of withstanding a temperature of 600°C and a preparation method thereof. Background technique [0002] With the development of radar and infrared composite detection and guidance technology, materials with radar / infrared compatible stealth functions have become an important research direction. However, there are inherent contradictions in achieving radar and infrared compatible stealth with the same material. The reason is that radar stealth requires materials with strong absorption and low reflection of electromagnetic waves, while infrared stealth requires materials with low absorption and high reflection of electromagnetic waves. Therefore, how to solve the contradiction between the two through material structure design is the key to realize radar and infrared compatible stealth. At the same...

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Problems solved by technology

[0003] Chinese Patent No. ZL201110053460.7, Chinese Patent No. ZL201110052115.1, Chinese Patent No. ZL201210139046.2, and Chinese Patent No. ZL201410128311.6 disclose several continuous fiber-reinforced ceramic-based wave-absorbing composite materials and their preparation methods. This kind of wave-absorbing composite material has good wave-absorbing performance and temperature resistance, but it does not have infrared stealth performance

At the same time, the patents disclosed above are all structural high-temperature stealth materials. Although they have good load-bearing properties, the mechanical properties of these materials still have a certain gap from metal materials, and it is difficult to use them as main load-bearing parts, and the cost is relatively higher

Compared with structural high-temperature stealth materials, high-temperature stealth coatings have the advantages of low cost and convenient construction, and have broad application prospects. However, there has not been any application of high-temperature stealth coatings in the field of radar and infrared compatible stealth materials.

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