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Environmental barrier-infrared stealth integrated coating, composite material containing coating and preparation method of composite material

A composite material and environmental barrier technology, applied in the field of coated composite materials and their preparation, and composite coatings, can solve problems such as difficulty in meeting the long-life requirements of thermal structural materials, lack of infrared stealth function, and material performance degradation, etc., to achieve Excellent infrared stealth function, reduce the intensity of infrared radiation, improve the effect of life

Active Publication Date: 2019-07-12
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the fibers, matrix or interface phase of such materials are prone to oxidation under high-temperature oxygen-enriched and water vapor conditions, and the performance of the material is seriously reduced, making it difficult to meet the long-life requirements of thermal structural materials; Ratio>0.7), does not have infrared stealth function

Method used

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  • Environmental barrier-infrared stealth integrated coating, composite material containing coating and preparation method of composite material
  • Environmental barrier-infrared stealth integrated coating, composite material containing coating and preparation method of composite material
  • Environmental barrier-infrared stealth integrated coating, composite material containing coating and preparation method of composite material

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Embodiment 1

[0051] a kind of like figure 1 The structure shown is coated on the SiC / SiC composite substrate 1 (such as figure 2 Shown) the environmental barrier-infrared stealth integrated coating on the surface, the environmental barrier-infrared stealth integrated coating is a multi-layer superimposed structure, including silicon bonding layer 2, mullite / BSAS (0.5BaO· 0.5SrO Al 2 o 3 2SiO2 2 ) Composite anti-oxidation layer 3, and Bi containing AgPd alloy filler 2 o 3 -ZnO-based glass with low infrared emissivity / sealing layer 4. The thickness of the silicon bonding layer 2 is about 75 μm, the thickness of the mullite layer is about 75 μm, the thickness of the BSAS layer is about 75 μm, and the thickness of the low infrared emissivity / sealing layer 4 is about 20 μm. Bi in AgPd-containing alloy 2 o 3 - ZnO-based glass with low infrared emissivity / sealing layer 4, the mass ratio of glass phase, metal Ag, and metal Pd is 8:64:28. Bi 2 o 3 The mass percentages of the raw materia...

Embodiment 2

[0064] An environmental barrier-infrared stealth integrated coating that can be coated on the surface of a SiC / SiC composite material substrate 1, the environmental barrier-infrared stealth integrated coating is a multi-layer superimposed structure, including a silicon bonding layer from the inside to the outside 2. Mullite / BSAS (0.5BaO 0.5SrO Al 2 o 3 2SiO2 2 ) Composite anti-oxidation layer 3, and Bi containing AgPd alloy filler 2 o 3 -ZnO-based glass with low infrared emissivity / sealing layer 4. The thickness of the silicon bonding layer 2 is about 75 μm, the thickness of the mullite layer is about 75 μm, the thickness of the BSAS layer is about 75 μm, and the thickness of the low infrared emissivity / sealing layer 4 is about 20 μm. Bi in AgPd-containing alloy 2 o 3 - ZnO-based glass with low infrared emissivity / sealing layer 4, the mass ratio of glass phase, metal Ag, and metal Pd is 8:64:28. Bi 2 o 3 The mass percentages of the raw materials of each component in t...

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Abstract

The invention discloses an environmental barrier-infrared stealth integrated coating capable of coating the surface of a non-oxide fiber reinforced non-oxide ceramic matrix composite material. The coating has a multi-layer superposition structure, and the multi-layer superposition structure comprises a silicon bonding layer, an anti-oxidation layer and a low infrared emissivity / encapsulation layerin sequence from the inside to the outside, wherein the anti-oxidation layer is a mullite single coating or a mullite / BSAS composite coating, and the low infrared emissivity / encapsulation layer is aBi2O3-ZnO-based glass coating containing a noble metal filler. The invention also provides a composite material containing the coating and a preparation method of the composite material. The environmental barrier-infrared stealth integrated coating provided by the invention adopts the multi-layer superposition structure, thermal expansion coefficients of each functional layer gradually and slowlychange, so that thermal mismatch among the layers is weakened, and the coating has excellent thermal shock resistance.

Description

technical field [0001] The invention belongs to the field of functional coatings and composite materials, in particular to a composite coating, a coated composite material and a preparation method thereof. Background technique [0002] With the rapid development of aerospace, military reconnaissance and guidance technology, engines, high-speed aircraft and other equipment have put forward new and higher requirements for thermal structural materials, which are embodied in several aspects: (1) Lightweight: high-speed aircraft and The lightweight of engine thermal structural materials can improve the range and payload of equipment, and improve economic and military benefits; (2) high temperature: the increase of engine thrust-to-weight ratio and aircraft flight speed requires thermal structural materials to withstand higher temperatures; (3) Long life: Reusable high-speed aircraft and aero-engines require thermal structural materials not to degrade under high temperature and lo...

Claims

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Application Information

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IPC IPC(8): C04B41/89
CPCC04B41/52C04B41/89C04B41/009C04B35/806C04B41/5096C04B41/4527C04B41/5035C04B41/4533C04B41/5029C04B41/5031C04B41/5027C04B41/5111C04B41/5022
Inventor 刘海韬黄文质孙逊黄丽华甘霞云
Owner NAT UNIV OF DEFENSE TECH
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