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Silicon carbide composite wave absorbing ceramic based on metamaterial and preparation method of silicon carbide composite wave absorbing ceramic

A composite material and composite material layer technology, applied in the field of metamaterial-based silicon carbide composite material wave absorbing ceramics and their preparation, can solve the problems of limited range of periodic structure selection, unsatisfactory high temperature wave absorption performance, and high brittleness of the dielectric base layer. , to achieve the effect of convenient engineering application, controllability and load-bearing of absorbing performance, and good absorbing performance

Active Publication Date: 2016-12-14
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still the following deficiencies: 1) The range of periodic structure selection is limited; 2) The dielectric base layer is brittle, easy to break, and poor in use reliability; 3) The high-temperature wave-absorbing performance is not ideal

Method used

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  • Silicon carbide composite wave absorbing ceramic based on metamaterial and preparation method of silicon carbide composite wave absorbing ceramic
  • Silicon carbide composite wave absorbing ceramic based on metamaterial and preparation method of silicon carbide composite wave absorbing ceramic
  • Silicon carbide composite wave absorbing ceramic based on metamaterial and preparation method of silicon carbide composite wave absorbing ceramic

Examples

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Effect test

Embodiment 1

[0052] A kind of metamaterial-based silicon carbide composite wave-absorbing ceramics of the present invention, such as figure 1 As shown, it is composed of a silicon carbide composite material layer 1, an anti-oxidation adhesive layer 2 and a metamaterial layer 3 from the inside to the outside. The silicon carbide composite material layer 1 is composed of fibers with a resistivity of 10 5 ~10 6 The continuous silicon carbide fiber plain weave cloth of Ω·cm is Z-stitched into a three-dimensional braided reinforced silicon carbide composite material, the anti-oxidation adhesive layer 2 is composed of cordierite coating, and the metamaterial layer 3 is composed of capacitive periodic pattern The resistive coating is arranged periodically, and the resistive coating includes a conductive phase and an organic carrier, and the conductive phase includes glass powder and ruthenium dioxide powder. Its preparation method comprises the following steps:

[0053] (1) Select a resistivit...

Embodiment 2

[0065] A silicon carbide composite wave-absorbing ceramic based on a metamaterial of the present invention is composed of a silicon carbide composite material layer, an anti-oxidation adhesive layer and a metamaterial layer from inside to outside in sequence, and the silicon carbide composite material layer is composed of fiber resistance Rate 10 5 ~10 6 The continuous SiC fiber plain weave cloth of Ω·cm is Z-stitched into a three-dimensional braid to reinforce the SiC composite material. The coating is arranged periodically, and the resistance coating includes a conductive phase and an organic carrier, and the conductive phase includes glass powder and ruthenium dioxide powder. Its preparation method comprises the following steps:

[0066] (1) Select a resistivity of 10 5 ~10 6 The continuous silicon carbide fiber of Ω·cm is woven into a plain weave with a thickness of about 0.4 mm according to the weaving density of 5 fibers / cm in the warp and weft directions, and the pl...

Embodiment 3

[0078] A silicon carbide composite wave-absorbing ceramic based on a metamaterial of the present invention is composed of a silicon carbide composite material layer, an anti-oxidation adhesive layer and a metamaterial layer from inside to outside in sequence, and the silicon carbide composite material layer is composed of fiber resistance Rate 10 5 ~10 6 The continuous SiC fiber plain weave cloth of Ω·cm is Z-stitched into a three-dimensional braid to reinforce the SiC composite material. The coating is arranged periodically, and the resistance coating includes a conductive phase and an organic carrier, and the conductive phase includes glass powder and ruthenium dioxide powder. Its preparation method comprises the following steps:

[0079] (1) Select a resistivity of 10 5 ~10 6 The continuous silicon carbide fiber of Ω·cm is woven into a plain weave with a thickness of about 0.45mm according to the weaving density of 5 fibers / cm in the warp and weft directions, and the pl...

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Abstract

The invention discloses silicon carbide composite wave absorbing ceramic based on a metamaterial. The silicon carbide composite wave absorbing ceramic is composed of a silicon carbide composite layer, an antioxidant bonding layer and a metamaterial layer from inside to outside in sequence. The silicon carbide composite layer is composed of a three-dimensional knitted part reinforced silicon carbide composite sewn through continuous silicon carbide fiber plain cloth in the Z direction, and the fiber electrical resistivity of the composite ranges from 10<5> omega.cm to 10<6> omega.cm; the antioxidant bonding layer is composed of a cordierite coating, and the metamaterial layer is formed by periodically arranging resistance coatings of capacitive or inductive periodic patterns. The advantages of achieving wide frequency and low frequency wave absorption, being resistant to high temperature, high in wave absorbing performance regulation and control performance, achieving bearing and the like are integrated, the technical problem of poor low frequency wave absorbing performance troubling a high-temperature wave absorbing material all the time is solved, the structure is simple, implementation is easy, and high designability is achieved. The invention further discloses a preparation method of the silicon carbide composite wave absorbing ceramic based on the metamaterial. The raw materials are easy to obtain, and engineering application is convenient.

Description

technical field [0001] The invention belongs to the field of high-temperature-resistant wave-absorbing materials, and in particular relates to a supermaterial-based silicon carbide composite wave-absorbing ceramic and a preparation method thereof. Background technique [0002] According to the service temperature range, radar absorbing materials can be divided into two categories: normal temperature (operating temperature below 200°C) and high temperature. In contrast, the current research on normal-temperature radar absorbing materials is relatively mature, while the research on high-temperature radar absorbing materials is still in active exploration. [0003] Continuous silicon carbide fiber-reinforced silicon carbide composite materials have the advantages of high temperature resistance, low density, high strength, high toughness, etc. At the same time, silicon carbide materials have semiconductor characteristics, and can be made to have different compositions and proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/565C04B35/622C04B41/89
CPCC04B35/565C04B35/622C04B35/80C04B41/52C04B41/89C04B41/5022C04B41/46C04B41/4803
Inventor 刘海韬程海峰田浩黄文质周永江姜如
Owner NAT UNIV OF DEFENSE TECH
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