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An ablation-resistant lightweight heat-proof and heat-insulating integrated composite material and its preparation method

A composite material and ablation-resistant technology, which is applied in chemical instruments and methods, aerospace vehicle heat protection devices, synthetic resin layered products, etc., can solve problems such as short service life, heat insulation and heat-resistant materials that are not resistant to ablation, etc.

Active Publication Date: 2020-07-07
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an ablation-resistant lightweight heat-proof and heat-insulating integrated composite material for the lack of ablation resistance and short service life of the heat insulation and heat protection materials used in the prior art, and its Simple preparation method

Method used

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  • An ablation-resistant lightweight heat-proof and heat-insulating integrated composite material and its preparation method
  • An ablation-resistant lightweight heat-proof and heat-insulating integrated composite material and its preparation method
  • An ablation-resistant lightweight heat-proof and heat-insulating integrated composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An ablation-resistant lightweight heat-proof and heat-insulating integrated composite material. The middle layer of the composite material is formed by chopped high-silica fiber as reinforcement, phenolic resin as resin, and glass microspheres as low-density filler. The surface layer is With high silica fiber cloth as reinforcement, with B 4 C powder, montmorillonite powder and silicon carbide powder are ceramic fillers in the surface layer.

[0041] The preparation of the ablation-resistant lightweight heat-proof and heat-insulating integrated composite material includes the following steps:

[0042] (1) will B 4 C powder and SiC powder were dispersed in an aqueous NaOH solution with a NaOH content of 10wt.% and treated for 1 h, filtered and washed with distilled water or deionized water until the filtrate was neutral, and dried at 150°C for later use; disperse the montmorillonite powder in absolute ethanol 2% by weight of the powder was added as a surface modifier, ...

Embodiment 2

[0054] An ablation-resistant lightweight heat-proof and heat-insulating integrated composite material. The middle layer of the composite material uses chopped quartz fibers as reinforcements, phenolic cyanate as resin, and glass beads as low-density fillers. The layer is reinforced with quartz fiber cloth, with B 4 C powder, glass powder, kaolin and silicon carbide powder are ceramic fillers.

[0055] The preparation method of the above-mentioned ablation-resistant lightweight heat-proof and heat-insulating integrated composite material includes the following steps:

[0056] (1) will B 4 C powder and SiC powder are dispersed in NaOH aqueous solution with 10wt.% NaOH content and treated for 1h, filtered and cleaned with distilled water or deionized water until the filtrate is neutral, and dried at 150°C for later use; disperse glass powder and kaolin in absolute ethanol 2% by weight of the powder was added as a surface modifier, suction filtered after 1 hour, and dried at 150...

Embodiment 3

[0068] An ablation-resistant lightweight heat-proof and heat-insulating integrated composite material. The middle layer of the composite material uses chopped mullite fiber as a reinforcement, phenolic resin as a resin, and ceramic microbeads as a low-density filler; the surface layer With alumina fiber cloth as reinforcement, MoSi 2 Powder, mica, feldspar and silicon carbide powder are ceramic fillers in the surface layer.

[0069] The preparation method of the above-mentioned ablation-resistant lightweight heat-proof and heat-insulating integrated composite material includes the following steps:

[0070] (1) MoSi 2 powder and SiC powder were dispersed in NaOH Hanling 10wt.% NaOH aqueous solution for 1h, filtered and washed with distilled water or deionized water until the filtrate was neutral, and dried at 150°C for later use; dispersed mica and feldspar powder in absolute ethanol 2% by weight of the powder was added as a surface modifier, suction filtered after 1 hour, an...

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Abstract

Provided is an ablation-resistant lightweight integrated composite material with a thermal insulation function. The composite material is of a sandwich structure, the middle layer adopts a chopped fiber as a reinforcing body, phenolic resin as a substrate and hollow microbeads as thermal insulation fillers, upper and lower surface layers are bonded to each other by a fiber cloth pre-impregnation material, and the three layers are cured to improve the bearing capacity and the anti-scouring capacity. The preparation method of the composite material comprises eight steps including ceramic powdertreatment, pretreatment of the chopped fiber and a fiber cloth, mixing, drying, slurry preparation, brushing or impregnation, mold filling, curing formation and demolding. The composite material can be applied to the ablation working condition of medium and low heat flux density; the composite material is formed at one time, so that the preparation cycle is short, and the cost is low; a stable ablation-resistant ceramic layer can be formed on the surface in a temperature range from 800 DEG C to 1,300 DEG C, and meanwhile, low-density fillers such as the hollow microspheres achieve a thermal insulation function. In this way, the integrated thermal insulation function under the conditions of medium and low heat flux density and oxidation is achieved.

Description

technical field [0001] The invention generally belongs to the technical field of aircraft thermal protection, and in particular relates to an ablation-resistant lightweight heat-proof and heat-insulating integrated composite material and a preparation method thereof. Background technique [0002] Lightweight thermal insulation integrated lightweight thermal protection material is the key technology for spacecraft represented by space maneuvering vehicles to achieve miniaturization, high payload ratio, and rapid access to space, which determines the advancement, reliability and economy of spacecraft. sex. With the development of my country's new spacecraft development, there is an urgent demand for lightweight thermal protection materials with integrated functions of heat protection and heat insulation. [0003] In 1976, 1996 and 2004, NASA's Mars "Viking", "Pioneer" and "Exploration Rovers" successfully landed on Mars respectively. The heat-proof layer on the windward side...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/42B32B27/20B32B27/04B32B37/06B32B37/10B32B38/08B32B38/00B64G1/58
CPCB32B5/02B32B27/12B32B27/20B32B27/42B32B37/06B32B37/10B32B38/00B32B38/08B32B2038/0076B32B2255/02B32B2255/26B32B2260/023B32B2260/046B32B2307/304B32B2307/3065B32B2307/718B64G1/58
Inventor 陈思安胡海峰陈志华
Owner NAT UNIV OF DEFENSE TECH
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