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High-temperature anti-oxidation carbon-ceramic composite material and preparation method thereof

A carbon-ceramic composite material and ceramic composite material technology, applied in the field of high-temperature oxidation-resistant carbon-ceramic composite materials and their preparation, can solve the problems of poor uniformity of coating composition, weak bonding force between coating and composite material substrate, and low density , to achieve the effect of low cost, controllable coating thickness and short process

Active Publication Date: 2019-02-19
湖南国科碳陶新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the obtained coating has weak bonding force with the composite material substrate, poor uniformity of coating composition, and low density.
At present, there are few studies on the preparation of anti-oxidation coatings by gas-phase siliconizing or liquid-phase siliconizing processes, and there are no detailed reports on the simultaneous preparation of C / C-SiC composite substrates and surface oxidation-resistant coatings.

Method used

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  • High-temperature anti-oxidation carbon-ceramic composite material and preparation method thereof
  • High-temperature anti-oxidation carbon-ceramic composite material and preparation method thereof
  • High-temperature anti-oxidation carbon-ceramic composite material and preparation method thereof

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Effect test

Embodiment 1

[0030] A method for preparing a high-temperature-resistant and oxidation-resistant carbon-ceramic composite material, the specific process is as follows:

[0031] 1) The needle-punched integral felt is used as a reinforcement, and the density is 0.3g / cm 3 , put it in a carbon deposition furnace, and carry out a chemical vapor deposition carbon process to prepare a C / C biscuit until its density reaches 1.2g / cm 3 ; Chemical vapor deposition process, using propylene as the carbon precursor gas, using Ar as the dilution gas, the pressure of the deposition chamber is 2000Pa, the deposition temperature is 900 ° C, and the volume ratio of propylene and Ar is 1:1;

[0032] 2) Use 400 mesh, 600 mesh, and 1200 mesh sandpaper to polish the surface and corners of the C / C green body successively, then ultrasonically clean it in absolute ethanol medium for 15 minutes, and dry it at 100°C to constant weight;

[0033] 3) C powder, SiC powder, chemically pure silica sol, ZrB 2 Powder is mixe...

Embodiment 2

[0039] A method for preparing a high-temperature-resistant and oxidation-resistant carbon-ceramic composite material, the specific process is as follows:

[0040] 1) Use needle-punched carbon cloth laminated carbon felt as a reinforcement, with a density of 0.28g / cm 3 , put it in a carbon deposition furnace, and carry out a chemical vapor deposition carbon process to prepare a C / C biscuit until its density reaches 1.1g / cm 3 ;Chemical vapor deposition process, with propane as the carbon precursor gas, Ar as the dilution gas, the pressure of the deposition chamber is 2000Pa, the deposition temperature is 900 ° C, the volume ratio of propane and Ar is 1:1

[0041] 2) Use 400 mesh, 600 mesh, and 1200 mesh sandpaper to polish the surface and corners of the C / C green body successively, then ultrasonically clean it in absolute ethanol medium for 15 minutes, and dry it at 100°C to constant weight

[0042] 3) C powder, SiC powder, chemically pure silica sol, MoSi 2 Powder is mixed ac...

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Abstract

The invention discloses a high-temperature anti-oxidation carbon-ceramic (C / C-SiC) composite material and a preparation method thereof. The high-temperature anti-oxidation carbon-ceramic (C / C-SiC) composite material is a carbon fiber preform reinforced C and SiC double-base ceramic-based composite material and comprises a carbon-ceramic composite material base and a SiC-based anti-oxidation ceramic coating on the surface of the carbon-ceramic composite material base. The preparation method includes the steps: preparing a precoating on the surface of the surface of the C / C composite material bya slurry coating process; performing gas-phase siliconing treatment on the C / C composite material coated with the precoating by a gas-phase siliconing process. In the gas-phase siliconing process, Sisteam penetrates the precoating and reacts with a C base in the C / C composite material to generate a SiC base and obtain the C / C-SiC composite material, the C / C-SiC composite material reacts with C in the precoating to generate SiC, so that a coating is sintered, pores in the coating are filled with the Si steam in a condensed manner during cooling, and the coating is compact.

Description

technical field [0001] The invention belongs to the technical field of thermal protection of ceramic-based composite materials, and in particular relates to a high-temperature oxidation-resistant carbon-ceramic composite material and a preparation method thereof. Background technique [0002] C / C-SiC composite material is a ceramic matrix composite material with carbon fiber reinforced C and SiC double matrix. C / C-SiC composite materials have a wide range of applications, mainly used for thermal structure and thermal protection materials, new generation friction materials, and components of space optical systems. In recent years, the preparation of C / C-SiC composites by liquid-phase siliconizing or gas-phase siliconizing has gained great attention and development. This is because this process has the advantages of simple process, short preparation cycle and low cost compared with chemical vapor deposition and polymer impregnation cracking process, and it is the preferred pr...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/573C04B35/80C04B35/622C04B41/87
CPCC04B35/806C04B35/573C04B35/622C04B35/83C04B41/507C04B41/5071C04B41/87C04B2235/614C04B41/5059C04B41/5035C04B41/4558C04B41/4539
Inventor 曹英斌周帆
Owner 湖南国科碳陶新材料科技有限公司
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