Multi-layer sandwich and locally-reinforced external heat-proof material as well as preparation method and application thereof

A local enhancement and heat-proof technology, applied in chemical instruments and methods, lamination, lamination devices, etc., can solve the problems of high assembly precision, high cost, and many processes involved, achieve fast production, reduce processes and costs , The effect of avoiding shedding and air leakage problems

Active Publication Date: 2022-01-07
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the combination of ceramic matrix composite material and airgel heat insulation material has high cost, high assembly precision requirements, and involves the screw connection of ceramic matrix composite material and metal cabin section, involving many processes, etc.

Method used

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  • Multi-layer sandwich and locally-reinforced external heat-proof material as well as preparation method and application thereof
  • Multi-layer sandwich and locally-reinforced external heat-proof material as well as preparation method and application thereof
  • Multi-layer sandwich and locally-reinforced external heat-proof material as well as preparation method and application thereof

Examples

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preparation example Construction

[0025] As mentioned above, the first aspect of the present invention provides a method for preparing a multi-layer sandwich and partially reinforced external heat-resistant composite material. The external heat-resistant composite material includes a first panel, a second panel, a An airgel core layer between the second panels; the outer heat-resistant composite material has a non-reinforced area and a locally reinforced area formed by a ceramic block, and the preparation method includes the following steps:

[0026] (1) Preparation of the core layer airgel composite material for forming the airgel core layer: according to the target thickness and target shape, prepare the core layer airgel composite material and process the local area to be reinforced;

[0027] (2) Preparation of the ceramic block prefabricated body for forming the ceramic block: the fiber fabric is laminated to the target thickness according to the predetermined thickness tolerance, and then sewed, and then c...

Embodiment 1

[0070] According to the target shape and target size (arc with arc length 300mm and width 300mm) of the outer heat-resistant material, an outer heat-resistant composite material with a locally reinforced ceramic ring (80mm in diameter) is prepared, and the ceramic convex altar has a diameter of 30mm round hole.

[0071] The preparation method of the outer heat-resistant composite material comprises the following steps:

[0072] First, the airgel core layer is prepared by using an airgel forming mold, that is, the mullite fiber felt is cut according to the cavity of the airgel forming model, and then the mold is closed, and 25% of the silicon precursor sol is injected into the mold to make the glue solution completely Impregnate the fiber matrix, undergo aging, solvent replacement, supercritical drying, and hydrophobic treatment to obtain a core layer airgel composite material with a thickness of 10 mm (sometimes called an airgel core layer).

[0073] According to the target s...

Embodiment 2

[0080] According to the target shape and target size of the outer heat-resistant material (circular boss with a diameter of 100mm, the thickness of the non-reinforced area is 15mm, the thickness of the reinforced area (boss area) is 30mm, the reinforced boss type, the size of the outer heat-resistant material 300mm × 300mm) to prepare an outer heat-resistant composite material with a 3-layer sandwich and partially a circular boss-shaped ceramic block. Such as figure 2 As shown, the ceramic block is divided into three parts by the second panel and the middle panel to form a circular boss type ceramic block. The ceramic block 43 is located on the second panel with a thickness of 15mm. The ceramic block 42 is between the second panel and the middle panel. , the thickness is 6mm, the ceramic block 41 is the ceramic block between the middle panel and the first panel, and the thickness is 6mm.

[0081] The preparation method of the outer heat-resistant composite material comprises...

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Abstract

The invention relates to a multi-layer sandwich and locally-reinforced outer heat-proof material as well as a preparation method and application thereof. The external heat-proof composite material comprises a first panel, a second panel and an aerogel core layer located between the first panel and the second panel. The external heatproof composite material has a non-reinforced region and a locally reinforced region formed from a ceramic block. The preparation method comprises the following steps: preparing a core layer aerogel composite material for forming an aerogel core layer; preparing a ceramic block preform for forming the ceramic block; preparing a panel prefabricated body; carrying out dip forming on the outer heat-proof composite material preform; and sintering and processing the outer heat-proof composite material green body. The density range of the obtained composite material is 0.5-0.8 g / cm < 3 >, the overall compression strength of the composite material is 2.50 MPa, the compression strength of the ceramic block is as high as 35 MPa, local reinforcement of a low-strength external heat-proof material can be achieved, external heat protection of the part, in the severe local heat environment, of an aircraft is achieved, and integrated forming of the light heat-proof and heat-insulation composite material is achieved.

Description

technical field [0001] The invention relates to the technical field of thermal protection, in particular to the technical field of thermal protective materials with local high-strength requirements outside the body of a hypersonic aircraft body, and in particular to a multi-layer sandwich and locally reinforced external heat-resistant material and its preparation method and application. Background technique [0002] At present, the sandwich composite materials used are composed of upper and lower panels, middle panels and airgel core layers. The single layer is a uniform material, but due to the strength or thickness of the outer panel, it cannot achieve high strength or high airflow resistance. Therefore, it is usually required In the special parts of the thermal protection system of the aircraft, such as the wing rudder interference area and the pressure measurement area of ​​the cabin, the combination of ceramic matrix composite material + airgel heat insulation material c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B3/08B32B9/04B32B5/06B32B33/00B32B38/08B32B38/16B32B38/00B32B37/06B64C1/40
CPCB32B9/00B32B3/08B32B9/047B32B5/02B32B5/06B32B33/00B32B38/08B32B38/164B32B38/00B32B37/06B64C1/40B32B2038/008B32B2262/10B32B2260/023B32B2307/304
Inventor 张丽娟张幸红裴雨辰程源徐沛李文静
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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