Silicon carbide-carbon composite material and preparation method thereof

A carbon composite material and silicon carbide technology, which is applied in the field of silicon carbide-carbon composite material and its preparation, can solve the problems of harsh equipment and resin requirements, difficulty in large-scale promotion, and high production cost, and achieve excellent high-temperature mechanical properties and high ratio. Modulus, low cost effect

Inactive Publication Date: 2012-10-24
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can prepare SiC-C materials, they are demanding on equipment and resins, and the production cost is high, which is difficult for ordinary enterprises to afford, and there are certain difficulties in large-scale promotion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A silicon carbide-carbon composite material and a preparation method thereof. Stir and mix 50~60wt% of graphite, 35~40wt% of high silica glass and 5~10wt% of phenolic resin for 2~30 minutes, press molding, and dry naturally for 24 hours; then at 110~150 Heat treatment at ℃ for 8~12 hours, then keep warm at 1300~1400℃ in carbon-buried atmosphere for 3~5 hours, cool naturally, and finally break into granules or powders with particle size less than 10mm.

Embodiment 2

[0021] A silicon carbide-carbon composite material and a preparation method thereof. Stir and mix 60~70wt% of graphite, 25~35wt% of high silica glass and 3~5wt% of phenolic resin for 2~30 minutes, press molding, and dry naturally for 24 hours; then in 150~200 Heat treatment at ℃ for 12~15 hours, then keep warm in CO atmosphere at 1400~1500℃ for 5~8 hours, cool naturally, and finally break into particles or powders with a particle size of less than 10mm.

Embodiment 3

[0023] A silicon carbide-carbon composite material and a preparation method thereof. Stir and mix 70~80wt% of graphite, 15~20wt% of high silica glass and 3~10wt% of phenolic resin for 2~30 minutes, press molding, and dry naturally for 24 hours; then at 200℃~ Heat treatment at 250°C for 15-20 hours, then keep warm in a carbon tube furnace at 1500-1600°C for 5-8 hours, cool naturally, and finally break into particles or powders with a particle size of less than 10mm.

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PUM

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Abstract

The invention relates to a silicon carbide-carbon composite material and a preparation method of the composite material. The technical scheme is as follows: firstly stirring and mixing 50-90wt% of graphite, 5-40wt% of high silica glass and 1-10wt% of phenolic resin, wherein the mixing time is 2-30 minutes, compressing and forming the mixture, and naturally drying the mixture for 24 hours; thermally treating the dried mixture for 8-24 hours at 110-330 DEG C, keeping the temperature for 1-12 hours in a reducing atmosphere at 1300-1700 DEG C, naturally cooling the mixture; and finally crushing the mixture to particles and powder with grain size smaller than 10mm. The preparation method has simple preparation processes and relatively low cost; the prepared silicon carbide-carbon composite material not only has good heat-conducting property and electrical conductivity, but also has excellent melt corrosion resistance performance and osmosis resistance performance.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials. In particular, it relates to a silicon carbide-carbon composite material and a preparation method thereof. Background technique [0002] Non-oxide composite materials are one of the important directions for the development of high-temperature industrial materials. Among them, silicon carbide-carbon composites combine the advantages of silicon carbide and graphite, and have excellent high-temperature mechanical properties, oxidation resistance, thermal shock stability, high specific strength, high specific modulus, and non-brittle fracture characteristics. This type of composite material will have broad application prospects in aviation, aerospace, new energy, metallurgy, etc. [0003] The current methods for preparing SiC-C materials include: chemical vapor infiltration method, hot pressing method, precursor impregnation cracking method and liquid phase or gas phase si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/52C04B35/622
Inventor 魏耀武许兴堂马列鹰吴斌王落霞李雪
Owner WUHAN UNIV OF SCI & TECH
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