Preparation method of composite ceramic coating for surface of carbon/carbon composite

A technology of carbon composite material and surface compounding, which is applied in the field of aerospace to achieve the effect of tight combination, simple preparation method, strong oxidation resistance and ablation resistance

Inactive Publication Date: 2018-08-28
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When intercontinental missiles, manned spacecraft, etc. return to the earth at high speed and pass through the atmosphere, friction with the atmosphere will generate a lot of heat energy. Therefore, the surface of th

Method used

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  • Preparation method of composite ceramic coating for surface of carbon/carbon composite
  • Preparation method of composite ceramic coating for surface of carbon/carbon composite
  • Preparation method of composite ceramic coating for surface of carbon/carbon composite

Examples

Experimental program
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Effect test

Embodiment 1

[0062] A method for preparing a composite ceramic coating on the surface of a carbon / carbon composite material includes the following steps:

[0063] Step 1, SiC-MoSi on the surface of carbon / carbon composite 2 Pre-coating preparation:

[0064] (1) Take 5g Si powder, 3.5g SiC powder and 13.5g MoSi according to the material ratio of 2:1:1 2 The powder is mixed to form the raw material powder, and polyvinyl alcohol-200 is added. The added amount of the polyvinyl alcohol-200 is 8.3% of the raw material powder according to the mass ratio. The raw material powder and the binder are ground for 30 minutes and mixed to form a mixture , Among them, Si powder, SiC powder and MoSi 2 The particle size of the powder is 75μm;

[0065] (2) Add deionized water to the mixture to make a viscous suspension with a concentration of 2.0g / mL. After standing for 20 minutes, stir again to evenly coat the suspension on the surface of the C / C composite material. Form a pre-coating with a thickness of 0.6mm;

...

Embodiment 2

[0072] A method for preparing a composite ceramic coating on the surface of a carbon / carbon composite material includes the following steps:

[0073] Step 1, SiC-MoSi on the surface of carbon / carbon composite 2 Pre-coating preparation:

[0074] (1) Take 5.7g Si powder, 4.1g SiC powder and 15.5g MoSi according to the material ratio of 2:1:1 2 The powder is mixed to form the raw material powder, and polyvinyl alcohol-200 is added. The added amount of the polyvinyl alcohol-200 is 9.0% of the raw material powder according to the mass ratio. The raw material powder and the binder are ground for 30 minutes and mixed to form a mixture , Among them, Si powder, SiC powder and MoSi 2 The particle size of the powder is 100μm;

[0075] (2) Add deionized water to the mixture to make a viscous suspension with a concentration of 2.5g / mL, let it stand for 25 minutes and stir again to evenly coat the surface of the C / C composite material. Form a pre-coating layer with a thickness of 0.7mm;

[0076] S...

Embodiment 3

[0082] A method for preparing a composite ceramic coating on the surface of a carbon / carbon composite material includes the following steps:

[0083] Step 1, SiC-MoSi on the surface of carbon / carbon composite 2 Pre-coating preparation:

[0084] (1) Take 6.4g Si powder, 4.5g SiC powder and 17.4g MoSi according to the material quantity ratio of 2:1:1 2 The powder is mixed to form the raw material powder, and polyvinyl alcohol-600 is added. The added amount of the polyvinyl alcohol-600 is 9.3% of the raw material powder according to the mass ratio. The raw material powder and the binder are ground for 30 minutes and mixed to form a mixture , Among them, Si powder, SiC powder and MoSi 2 The particle size of the powder is 120μm;

[0085] (2) Add deionized water to the mixture to make a viscous suspension with a concentration of 2.5g / mL, let it stand for 25 minutes and stir again to evenly coat the surface of the C / C composite material. Form a pre-coating layer with a thickness of 0.8mm; ...

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Abstract

The invention relates to a preparation method of a composite ceramic coating for the surface of a carbon/carbon composite, and belongs to the technical field of aerospace. The preparation method specially comprises the steps of mixing Si powder with SiC powder and MoSi2 in molar ratio, adding a binder in a compounding ratio, and performing thorough mixing to obtain a mixture; adding deionized water to the mixture, performing blending to obtain viscous suspending liquid, allowing standing still, performing uniform stirring once again, and uniformly coating the suspending liquid onto the surfaceof the C/C composite, to form a precoated layer; performing air-drying prebaking treatment to form a carbon/carbon composite sample of which the surface is coated with an SiC-MoSi2 precoated layer, and putting the carbon/carbon composite sample in a mould for calcining, wherein the SiC-MoSi2 precoated layer and the carbon/carbon composite sample basal body are subjected to a chemical reaction, sothat the SiC-MoSi2 composite ceramic coating for the surface of the carbon/carbon composite is prepared. The SiC-MoSi2 composite ceramic coating for the surface of the carbon/carbon composite prepared according to the preparation method disclosed by the invention is tightly combined with the basal body through test with a scanning electron microscope and a metallographical microscope, and has favorable oxidation resistance and burning erosion resistance.

Description

Technical field: [0001] The invention belongs to the field of aerospace technology, and specifically relates to a method for preparing a composite ceramic coating on the surface of a carbon / carbon composite material. Background technique: [0002] After entering the 21st century, carbon / carbon (C / C) composite materials have become well-known functional materials and structural materials, and have been developed by leaps and bounds, with their application scope and performance increasing year by year. C / C composite material has excellent performance and is a very important material in the aerospace field. Its development is mainly driven by the requirements of the missile and aerospace industries. Therefore, the most widely used field is the aerospace field. When intercontinental missiles, manned spacecraft, etc. return to the earth at high speed and pass through the atmosphere, friction with the atmosphere will generate a lot of heat energy. Therefore, the surface of the aircraft...

Claims

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Application Information

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IPC IPC(8): C04B41/87
CPCC04B41/009C04B41/5071C04B41/87C04B35/83C04B41/5059C04B41/4556C04B41/4539
Inventor 马瑞廷汪金铭赵海涛李喜坤赵晖王余莲张武
Owner SHENYANG LIGONG UNIV
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