Thermal-insulating anti-scouring heat shielding layer and preparation method thereof

A heat-resistant layer and anti-scour technology, applied in chemical instruments and methods, layered products, metal layered products, etc. Key technologies and other issues to achieve the effect of increasing the effective flight load and reducing the important

Active Publication Date: 2019-02-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the erosion resistance of PICA materials is weak, and the traditional treatment method is to use coatings, whose erosion resistance is not ideal. At the same time, the coating co

Method used

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  • Thermal-insulating anti-scouring heat shielding layer and preparation method thereof
  • Thermal-insulating anti-scouring heat shielding layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Embodiment 1 provides a heat-insulating, anti-scour and heat-proof layer, the heat-proof layer includes an inner layer of heat-insulating layer and an outer layer of anti-scour and heat-proof layer;

[0093] The inner heat insulation layer is made of modified phenolic resin solution and fiber prefabricated body through sol-gel reaction, aging and drying;

[0094] The outer scour-resistant and heat-proof layer is made of ablation-resistant resin solution and ablation-resistant fiber fabric through winding molding.

[0095] Such as figure 1 As shown, the specific preparation steps are as follows:

[0096] (a) Preparation of inner heat insulation layer

[0097] (1) Mix the modified phenolic resin, curing agent and solvent evenly, dissolve completely and prepare the modified phenolic resin solution; wherein, the modified phenolic resin is selected from boron modified phenolic resin, and the curing agent is selected from hexamethylene tetra Amine, solvent selects ethano...

Embodiment 2

[0113] Embodiment 2 provides a heat-insulating, anti-scour and heat-proof layer, the heat-proof layer includes an inner layer of heat-insulating layer and an outer layer of anti-scour and heat-proof layer;

[0114] The inner heat insulation layer is made of modified phenolic resin solution and fiber prefabricated body through sol-gel reaction, aging and drying;

[0115] The outer scour-resistant and heat-proof layer is made of ablation-resistant resin solution and ablation-resistant fiber fabric through winding molding.

[0116] Concrete preparation steps are as follows:

[0117] (a) Prepare the outer anti-scour and heat-resistant layer

[0118] The preparation method is basically the same as that of Example 1, except that the width of the outer prepreg tape is 25 mm, and the winding thickness is 3 mm.

[0119] (b) Integral molding

[0120] Trial assembly: Pre-assemble the fiber prefabricated body in the outer anti-scouring heat-proof layer and the inner heat insulation...

Embodiment 3

[0127] Embodiment 3 provides a heat-insulating, anti-scour and heat-proof layer, the heat-proof layer includes an inner layer of heat-insulating layer and an outer layer of anti-scour and heat-proof layer;

[0128] The inner heat insulation layer is made of modified phenolic resin solution and fiber prefabricated body through sol-gel reaction, aging and drying;

[0129] The outer scour-resistant and heat-proof layer is made of ablation-resistant resin solution and ablation-resistant fiber fabric through winding molding.

[0130] Preparation method is basically the same as Example 1, except that:

[0131] In step (a), the curing agent is selected from paraformaldehyde, and the mass ratio of boron modified phenolic resin and paraformaldehyde is 20:1;

[0132] In step (b), the ablation-resistant fiber fabric is selected from viscose-based carbon fiber plain cloth; the winding angle is 20°, the pressure is 0.3MPa, the temperature is 80°C, the tape preheating temperature is 70°C, ...

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Abstract

The invention relates to a thermal-insulating anti-scouring heat shielding layer and a preparation method thereof. The heat shielding layer comprises an inner thermal insulating layer and an outer anti-scouring heat shielding layer, wherein the inner thermal insulating layer is prepared by carrying out a sol-gel reaction on a modified phenolic resin solution and a fiber preform, aging and drying;and the outer anti-scouring heat shielding layer is prepared by winding and molding an ablation resistant resin solution and an ablation resistant fiber fabric. The preparation method comprises the following steps: sleeving and adhering the inner thermal insulating layer and the outer anti-scouring heat shielding layer, thereby obtaining the thermal-insulating anti-scouring heat shielding layer. The high-temperature-resistant anti-scouring heat shielding layer is increased on the outer side of the inner thermal insulating layer material, and the thermal-insulating anti-scouring heat shieldinglayer prepared by compounding the two layers together overcomes the defect that the inner thermal insulating layer material is poor in scouring resistance. Moreover, the weight of the overall materialcan be obviously reduced, and the effective flight load is improved.

Description

technical field [0001] The invention relates to the technical field of lightweight heat protection, in particular to a heat-insulating, erosion-resistant, and heat-resistant layer and a preparation method thereof. Background technique [0002] Thermal protection materials are a class of composite materials that are widely concerned at present. In recent years, near-space vehicles and long-duration flight weapons have attracted widespread attention from all over the world. The service characteristics of this type of aircraft, such as long-duration flight, medium-low heat flux density, and medium enthalpy value, have proposed new application environments and opportunities for thermal protection materials and their structures. Requirements, including long-term heat protection, high-efficiency heat insulation, high load-carrying capacity, high reliability, etc. The external aerodynamic heating is serious. Under the conditions of high temperature and high-speed airflow, the surf...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B17/12B32B17/02B32B17/06B32B15/00B32B27/04B32B27/38C08L61/14C08K7/14C08K7/06
CPCB32B5/02B32B5/08B32B5/26B32B15/00B32B15/14B32B2260/021B32B2260/046B32B2262/10B32B2262/101B32B2262/106C08K7/06C08K7/14C08L61/14
Inventor 郝春功夏雨许孔力许学伟谢永旺王国勇
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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