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A carbon/carbon composite material surface functional coating and preparation method thereof

A carbon composite material and functional technology, applied in the field of inorganic materials, can solve the problems of high-efficiency and thin-layer electromagnetic functional coatings that are difficult to be compatible and fall off, and achieve the effect of improving electromagnetic functional characteristics, improving service performance, and being easy to achieve

Active Publication Date: 2022-02-15
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] If the high-temperature electromagnetic functional layer is directly transplanted onto the C / C composite material, the coating needs to be thicker than 2mm to achieve efficient electromagnetic functions, and the thermal stress and thermal mismatch between the coating and the substrate at high temperatures under this thickness The problem will be very serious, or even fall off directly, so it is difficult to be compatible with the high efficiency and thin layer of the coating for electromagnetic function. Based on the above problems, it is urgent to develop a composite coating based on a new mechanism to meet the high temperature resistance of C / C composite materials. Oxidation Low Scattering Versatility Needed

Method used

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  • A carbon/carbon composite material surface functional coating and preparation method thereof
  • A carbon/carbon composite material surface functional coating and preparation method thereof
  • A carbon/carbon composite material surface functional coating and preparation method thereof

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Embodiment 1

[0046] In this embodiment, the transition bonding layer 2 is a C-SiC transition bonding layer with a thickness of 0.1 mm; the anti-oxidation structure layer 3 is Al 2 o 3 The anti-oxidation structural layer has a thickness of 0.8mm; the material of the electromagnetic functional block is mainly Ag-Pd alloy, and the thickness is 0.08mm. Each electromagnetic functional block is arranged periodically according to the above to form a pattern of two checkerboard units interlaced, such as figure 2 As shown, the space ratio of the checkerboard unit is 1, and each checkerboard unit contains a 6×6 primitive sequence (the primitive sequence refers to a 0 primitive pattern or a 1 primitive pattern), and the side length of the square grid unit is 4mm , in the 0 primitive pattern, the side lengths of the first 0 primitive block 41 and the second 0 primitive block 42 are 1.8mm and 1.6mm respectively, in the 1 primitive pattern, the first 1 primitive block 43 and the second 1 The side len...

Embodiment 2

[0053] In this embodiment, the transition bonding layer 2 is C-SiC-ZrC-ZrSi 2 The transition bonding layer has a thickness of 0.1 mm; the anti-oxidation structure layer 3 is an MAS anti-oxidation structure layer, and its thickness is 1 mm; the material of the electromagnetic functional block is mainly Mo-Si alloy, and its thickness is 0.02 mm. Each electromagnetic functional block is arranged periodically according to the above to form a pattern of two checkerboard units interlaced. The space ratio of the checkerboard unit is 1, and each checkerboard unit contains a 6×6 primitive sequence (the primitive sequence refers to a 0 primitive pattern or 1 primitive pattern), the side length of the square grid unit is 5mm, in the 0 primitive pattern, the side lengths of the first 0 primitive block 41 and the second 0 primitive block 42 are 2.2mm and 2mm respectively, and the 1 primitive In the element pattern, the side lengths of the first 1-unit block 43 and the second 1-unit block 4...

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Abstract

The invention discloses a functional coating on the surface of a carbon / carbon composite material. The functional coating comprises a transition bonding layer arranged on the surface of the carbon / carbon composite material, an anti-oxidation structure layer arranged on the surface of the transition bonding layer, and The electromagnetic functional layer arranged on the surface of the anti-oxidation structure layer; wherein, the electromagnetic functional layer is composed of a plurality of first electromagnetic functional block groups and second electromagnetic functional block groups arranged periodically to form a checkerboard pattern. When the electromagnetic wave irradiates the surface of the material, the amplitude of the reflected wave of the electromagnetic wave on the two checkerboard units is similar, but the phase is completely opposite. The low detectability of the / C composite material can realize the electromagnetic function modification of the surface thin layer and high efficiency of the carbon / carbon composite material.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a functional coating on the surface of a carbon / carbon composite material and a preparation method thereof. Background technique [0002] Carbon / carbon composite material (C / C) is a carbon-based composite material with carbon fiber as reinforcement, and its theoretical density is only 2.2g / cm 3 Compared with high-temperature ceramics and high-temperature alloys, it has the advantage of light specific gravity, and can maintain high strength, high modulus, good fracture toughness and wear resistance in high-temperature inert environments, and is one of the most ideal high-temperature structural materials. Because it is completely composed of a single carbon element, high temperature and easy oxidation are the bottleneck of the application of C / C composite materials as thermal structural parts. Most of the current research focuses on the anti-oxidation coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/89
CPCC04B41/52C04B41/89C04B41/009C04B35/83C04B41/5059C04B41/4556C04B41/5001C04B41/5071C04B41/5057C04B41/522C04B41/5031C04B41/4527C04B41/5035C04B41/5029C04B41/5111C04B41/4535C04B41/5049C04B41/5006C04B41/0072C04B41/4572C04B41/5133
Inventor 蒋进明王甲富郑麟李勇峰屈绍波张介秋
Owner AIR FORCE UNIV PLA
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