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A kind of heat protection material with high heat flux resistance and preparation method thereof

A technology of thermal protection material and flow density, applied in the direction of coating, layered products, fiber processing, etc., can solve the problem of poor damage resistance of lightweight thermal protection materials, achieve simple structure, high reliability, expand the system and The effect of implementing the method

Active Publication Date: 2021-07-13
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a thermal protection material resistant to high heat flux density and its preparation method, which forms an integrated thermal insulation layer consisting of a low-density thermal insulation bottom layer and a dense surface layer with high mechanical properties and high heat flux resistance. The lightweight heat protection material solves the two problems of heat protection and heat insulation at the same time, and solves the problem of poor damage resistance of the light heat protection material. The heat protection material has a simple structure, no mechanical connection, high reliability, and the highest durability Heat flux capability up to 2.0MW / m 2 above

Method used

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preparation example Construction

[0041] An embodiment of the present invention provides a method for preparing a high heat flux resistant thermal protection material, comprising the following steps:

[0042] (1) Prepare the second carbon fiber layer on one side of the first carbon fiber layer to obtain an integrated carbon fiber fabric, wherein the thermal conductivity of the first carbon fiber layer is greater than the thermal conductivity of the second carbon fiber layer, and the second carbon fiber layer a carbon fiber layer having a density greater than that of the second carbon fiber layer;

[0043]Specifically, the first carbon fiber layer is a laminar fabric structure, which can be made of the first carbon fiber, the first carbon fiber carbon cloth and / or the first carbon fiber net tire through weaving, needle punching or sewing, etc. A carbon fiber layer can also be made of the first carbon fiber to form the main structure, which is formed by inserting other carbon fiber mesh tires, carbon cloth, etc....

Embodiment 1

[0074] This embodiment provides a high heat flux resistant thermal protection material, the preparation method of which comprises:

[0075] (1) Lay layers of high thermal conductivity mesophase pitch-based carbon fiber cloth with a thermal conductivity of 950W / (m.K) and its mesh tires alternately. Before laying the uppermost layer of mesophase pitch-based carbon fiber cloth, lay a layer of viscose base carbon fiber mesh tire, and then spread the uppermost layer of mesophase pitch-based carbon fiber cloth, which is needle-punched to obtain a thickness of 10mm and a density of 0.55g / cm 3 The first carbon fiber layer; on the upper surface of the first carbon fiber layer lay a viscose-based carbon fiber mesh tire, and continue to form a layer with a thickness of 50mm and a density of 0.16g / cm by acupuncture. 3 The second carbon fiber layer finally forms an integrated carbon fiber fabric (size 200×50×60mm), with an overall density of about 0.23g / cm 3 .

[0076] (2) Using propane ...

Embodiment 2

[0082] This embodiment provides a high heat flux resistant thermal protection material, the preparation method of which comprises:

[0083] (1) Alternately lay layers of high thermal conductivity mesophase pitch-based carbon fiber cloth with a thermal conductivity of 950W / (m.K) and vapor-phase grown carbon fiber mesh tires, and lay a layer before laying the top layer of mesophase pitch-based carbon fiber cloth Polyacrylonitrile-based T300 carbon fiber mesh tire, and then lay the uppermost layer of mesophase pitch-based carbon fiber cloth, needle punched to obtain a thickness of 12mm and a density of 0.53g / cm 3 The first carbon fiber layer; on the upper surface of the first carbon fiber layer, polyacrylonitrile-based T300 carbon fiber mesh tires are laid, and the acupuncture method is used to continue to form a thickness of 45mm and a density of 0.18g / cm 3 The second carbon fiber layer finally forms an integrated carbon fiber fabric (size 200×50×57mm), with an overall density o...

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Abstract

The invention relates to a heat protection material resistant to high heat flux density and a preparation method thereof, belonging to the field of inorganic functional materials. The preparation method of the heat protection material resistant to high heat flux provided by the present invention adopts the method of preparing the second carbon fiber layer with low thermal conductivity and low density on one side of the first carbon fiber layer with high thermal conductivity and high density, so that the upper and lower layers have different properties The integrated integral fabric, after shaping, strengthening and densifying the first carbon fiber layer to form a low-density heat-insulating bottom layer and a dense surface layer with high mechanical properties and high heat flux resistance The anti-heat insulation integrated lightweight heat protection material solves the two problems of heat protection and heat insulation under high heat flux at the same time, and solves the problem of poor damage resistance of light heat protection materials; the heat protection provided by the invention The structure of the material is simple, no mechanical connection is required, the reliability is high, and the highest heat flux density can reach 2.0MW / m 2 above.

Description

technical field [0001] The invention relates to a method for preparing a heat protection material resistant to high heat flux density, which belongs to the field of inorganic functional materials. Background technique [0002] The thermal protection system is the key to ensure the survival of the aerospace vehicle in the aerodynamic heating environment during high-speed service. With the gradual development of modern aircraft in the direction of rapidity, light weight, long-term use, and reusability, thermal protection systems are faced with more stringent requirements for multiple aerodynamic heating service environments and substantial weight reduction. 1.5MW / m 2 above), lightweight (density less than 0.8g / cm 3 ), heat protection / heat insulation integration and other multi-functional thermal protection materials have put forward more and more urgent demands. [0003] Lightweight heat-insulating materials represented by ceramic tiles and heat-resistant materials formed w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D06M11/77D06M15/41D06M11/80B32B9/00B32B9/04B32B33/00D06M101/40
CPCB32B5/02B32B5/26B32B33/00B32B2255/20B32B2255/26B32B2262/106B32B2307/304B32B2307/306B32B2307/7244D06M11/74D06M11/77D06M11/80D06M15/41D06M2101/40
Inventor 李同起张大海樊桢杨文彬
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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