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Method for forming anti-ablation coating on surface of resin-based composite material

A composite material, anti-ablation technology, applied to the device, coating, special surface and other directions of coating liquid on the surface, can solve the problems of shedding, interlayer stress mismatch, low bonding strength, etc., to extend the time limit, The effect of improving the thermal insulation and heat protection function and reducing the input rate

Active Publication Date: 2019-11-05
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermal barrier coatings have low thermal conductivity and appropriate expansion coefficient, and have good thermal insulation properties. They are relatively mature in thermal protection applications on metal-based surfaces, but their bonding strength with resin-based composite materials is low, and there are interlayers. The problem of stress mismatch, it is easy to fall off during use and lose the heat insulation effect

Method used

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  • Method for forming anti-ablation coating on surface of resin-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for sweating anti-ablation composite coating for thermal protection of polyimide resin-based composite materials, comprising the following steps:

[0030] Step 1: First select Zn, Al, and Cu powders with a particle size of 1 μm, wherein the mass percentage range ratio of Zn powder: Al powder: Cu powder is 30:40:30.

[0031] Step 2: The mixed powder obtained in Step 1 is then ball milled and mixed in a liquid medium (alcohol) at a speed of 10 rpm / s, and mixed for 10 hours; then ultrasonicated at a frequency of 15 Hz for 1 hour; dried at 60°C for 1 hour, A mixed powder of Zn, Al and Cu is obtained.

[0032] Step 3: Add the mixed powder obtained in Step 2 to polyvinyl alcohol with a mass ratio of 10%, heat to 60° C., and stir for 60 min at a stirring speed of 500 rpm / min. The stirred and mixed liquid material is sprayed and granulated under vacuum conditions to obtain a Zn / Al / Cu composite spraying material with a particle size of 30-40 μm, which is us...

Embodiment 2

[0043] On the basis of the foregoing embodiments, the steps of this embodiment are:

[0044] Step 1: First select Zn, Al, and Cu powders with a particle size of 2 μm, wherein the mass percentage range ratio of Zn powder: Al powder: Cu powder is 35:45:20.

[0045] Step 2: Then the mixed powder obtained in step 1 was ball milled and mixed in a liquid medium (alcohol) at a speed of 12rpm / s, and mixed for 12 hours; then ultrasonically treated at a frequency of 17Hz for 1.4 hours; dried at 70°C for 1.4 hours, A mixed powder of Zn, Al and Cu is obtained.

[0046] Step 3: Add the mixed powder obtained in Step 2 to polyvinyl alcohol with a mass ratio of 12%, heat to 70° C., and stir for 70 minutes at a stirring rate of 600 rpm / min. The stirred and mixed liquid material is sprayed and granulated under vacuum conditions to obtain a Zn / Al / Cu composite spraying material with a particle size of 30 μm to 40 μm, which is used as a primer layer for thermal spraying.

[0047] Step 4: Mix Al ...

Embodiment 3

[0057] On the basis of the foregoing embodiments, the steps of this embodiment are:

[0058] Step 1: First select Zn, Al, and Cu powders with a particle size of 3 μm, wherein the mass percentage range ratio of Zn powder: Al powder: Cu powder is 35:50:15.

[0059] Step 2: Then the mixed powder obtained in step 1 was ball-milled and mixed in a liquid medium (alcohol) at a speed of 15 rpm / s, and mixed for 15 hours; then ultrasonically treated at a frequency of 20 Hz for 2 hours; dried at 90°C for 2 hours, A mixed powder of Zn, Al and Cu is obtained.

[0060] Step 3: Add the mixed powder obtained in Step 2 into polyvinyl alcohol with a mass ratio of 15%, heat to 80° C., and stir for 90 minutes at a stirring speed of 700 rpm / min. The stirred and mixed liquid material is sprayed and granulated under vacuum conditions to obtain a Zn / Al / Cu composite spraying material with a particle size of 30 μm to 40 μm, which is used as a primer layer for thermal spraying.

[0061] Step 4: Mix Al...

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Abstract

The invention relates to a method for forming an anti-ablation coating on the surface of a resin-based composite material. The anti-ablation coating is composed of a bottom layer, a middle layer and asurface layer. The method comprises the following steps that powder and paint are prepared, and multiple layers are formed through spraying in sequence. The method has the beneficial effects that thelow-melting-point Zn / Al / Cu compound bottom layer is utilized to ensure that thermal damage caused to the surface of the resin-based composite material is avoided during spraying; the Mo-modified NiCoCr compound middle layer can improve the thermal stress matching property and the interlayer bonding strength between the bottom layer and the surface layer; a good heat insulation function is well achieved while the thermal conductivity is relatively low; and the YSZ ceramic surface layer is compounded by adding components with specific heat release, on the one hand, the ceramic layer achieves good heat-insulation and anti-ablation functions, and on the other hand, the ablation and heat dissipation of the composite material are further improved through high-temperature ablation phase gasification and heat dissipation.

Description

technical field [0001] The invention belongs to the field of thermal protective coating materials for resin-based composite materials, in particular to a method for forming an anti-ablation coating on the surface of a resin-based composite material, in particular to ablation-resistant and anti-ablation coatings for polyimide resin-based composite materials heat protection. Background technique [0002] Polyimide resin-based composite materials have a series of advantages such as high specific strength, strong designability, and good fatigue fracture resistance. , The thrust reverser device has been widely used, and the weight reduction effect is obvious. [0003] The service environment of advanced aero-engines is at a higher temperature, which puts forward higher thermal protection requirements for the service performance of engine components of polyimide resin-based composite materials. performance stability. At present, the polyimide resin-based composite material with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D5/00B05D1/38B05D3/02B05D3/04B05D7/02C09D129/04C09D5/38C09D7/65C09D7/61C08J7/04C08L79/08
CPCB05D7/24B05D5/00B05D7/584B05D3/0218B05D3/0426B05D7/02C09D129/04C09D5/38C09D7/65C09D7/61C08J7/042C08J2379/08C08J2429/04C08L2205/035C08L61/06C08L83/04C08L67/00C08K3/08C08K3/36
Inventor 田浩亮庞洁王长亮郭孟秋汤智慧于洋高俊国周子民崔永静王天颖张昂张欢欢
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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