A kind of preparation method of composite ceramic coating on the surface of carbon/carbon composite material

A technology of carbon composite materials and ceramic coatings, applied in the field of aerospace

Inactive Publication Date: 2021-06-15
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 the aircraft must be made of materials with excellent heat resistance to resist extremely high temperature and harsh environments. Ordinary high melting point metals and metal compounds are also difficult to withstand

Method used

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  • A kind of preparation method of composite ceramic coating on the surface of carbon/carbon composite material
  • A kind of preparation method of composite ceramic coating on the surface of carbon/carbon composite material
  • A kind of preparation method of composite ceramic coating on the surface of carbon/carbon composite material

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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, comprising the steps of:

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

[0064] (1) According to the quantity ratio of substances 2:1:1, take 5g Si powder, 3.5g SiC powder and 13.5g MoSi 2 Mix the powders to form a raw material powder, add polyvinyl alcohol-200, the amount of polyvinyl alcohol-200 added is 8.3% of the raw material powder by mass ratio, use a mortar to grind the raw material powder and binder for 30 minutes and mix to form a mixture , among them, Si powder, SiC powder and MoSi 2 The powder particle size of the powder is 75 μm;

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

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

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

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

[0076] Step 2, after...

Embodiment 3

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

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

[0084] (1) According to the quantity ratio of substances 2:1:1, take 6.4g Si powder, 4.5g SiC powder and 17.4g MoSi 2 Mix the powder to form a raw material powder, add polyvinyl alcohol-600, the amount of polyvinyl alcohol-600 added is 9.3% of the raw material powder by mass ratio, use a mortar to grind the raw material powder and binder for 30 minutes and mix to form a mixture , among them, Si powder, SiC powder and MoSi 2 The powder 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, stir again after standing for 25min, and evenly coat the suspension on the surface of the C / C composite material, Form a pre-coat layer with a thickness of 0.8mm;

[0086] Ste...

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Abstract

A method for preparing a composite ceramic coating on the surface of a carbon / carbon composite material belongs to the field of aerospace technology, and the specific steps are: taking Si, SiC and MoSi according to the amount ratio of substances 2 Mix the powder, add the binder according to the ratio, and mix thoroughly to form a mixture; add deionized water to the mixture to make a viscous suspension, stir it again after standing still, and evenly coat the suspension on C / The surface of the C composite material forms a pre-coating; after air-intervention drying treatment, the surface is coated with SiC‑MoSi 2 Pre-coated carbon / carbon composite sample placed in a mold for calcination, SiC‑MoSi 2 The chemical reaction between the pre-coating layer and the carbon / carbon composite material substrate produces SiC~MoSi on the surface of the carbon / carbon composite material 2 Composite ceramic coating. The surface SiC~MoSi of the carbon / carbon composite material prepared by the invention 2 The composite ceramic coating is tested by scanning electron microscope and metallographic microscope to be closely combined with the substrate, and has good oxidation resistance and ablation resistance.

Description

Technical field: [0001] The invention belongs to the technical field of aerospace, and in particular 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 greatly developed, and their application range and performance have been improved 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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Patent Type & Authority Patents(China)
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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