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Carbon fiber reinforced silicon carbide ceramic matrix composite material and preparation method thereof

A technology of silicon carbide ceramic matrix and composite materials, which is applied in the field of new materials, can solve problems such as the difficulty of manufacturing large and complex parts, achieve good uniformity, improve mechanical compatibility, and reduce production costs

Active Publication Date: 2019-05-07
湖南兴晟新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent makes full use of the short impregnation time of the PIP method and the rapid sintering of the SPS method to realize the preparation of C / SiC composite materials, but this method is only suitable for the compactness of small components, and it is difficult to manufacture large and complex components.

Method used

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  • Carbon fiber reinforced silicon carbide ceramic matrix composite material and preparation method thereof
  • Carbon fiber reinforced silicon carbide ceramic matrix composite material and preparation method thereof
  • Carbon fiber reinforced silicon carbide ceramic matrix composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of silicon carbide slurry: put silicon carbide powder and phenolic resin powder in a mass ratio of 10:1 into an aqueous solution with a mass fraction of sodium carboxymethylcellulose (dispersant) of 0.5%, and mix well . Among them, silicon carbide powder and phenolic resin powder have particle sizes of 600 mesh and 1000 mesh respectively. The mixed slurry was ball milled for 1 hour at a rotational speed of 160 r / min. The viscosity of the prepared slurry was 180 mPa.s, and the solid content of the slurry was 25%.

[0034] (2)Cf / Preparation of C-SiC composite green body: Spread the carbon fiber felt / non-weft cloth on the porous metal mesh, and spray the slurry evenly on the surface of the carbon fiber felt / non-weft cloth by spraying method to make a single-layer mixed powder carbon fiber felt / Weft-free cloth, and then stack the prepared single-layer mixed powder carbon fiber felt and carbon fiber non-weft cloth alternately to four layers, and the stack...

Embodiment 2

[0040] (1) Preparation of slurry: put silicon carbide powder, graphite powder, and phenolic resin powder in a mass ratio of 10:2:2 into an aqueous solution with a mass fraction of sodium carboxymethylcellulose (dispersant) of 0.5% ,well mixed. The particle sizes of silicon carbide powder, graphite powder and phenolic resin powder are 600 mesh, 600 mesh and 600 mesh respectively. The mixed slurry was ball milled for 1 hour at a rotational speed of 280 r / min. The viscosity of the prepared slurry was 180 mPa.s, and the solid content of the slurry was 25%.

[0041] (2)C f / C-SiC composite material green body preparation: spread the carbon fiber felt / non-weft cloth on the porous metal mesh, and use the casting method to evenly coat the slurry on the surface of the carbon fiber felt / non-weft cloth to make a single-layer mixed powder carbon fiber Felt / non-weft cloth, and then stack the prepared single-layer mixed powder carbon fiber felt and carbon fiber non-weft cloth alternately...

Embodiment 3

[0047] (1) Preparation of slurry: put silicon carbide powder, graphite powder, and phenolic resin powder into an aqueous solution with a mass fraction of polyethylene glycol (dispersant) of 0.15% in a mass ratio of 10:4:1, and mix uniform. The particle sizes of silicon carbide powder, graphite powder and phenolic resin powder are 6000 mesh, 1200 mesh and 1000 mesh respectively. The mixed slurry was ball milled for 1 hour at a rotational speed of 160 r / min. The viscosity of the prepared slurry was 300 mPa.s, and the solid content of the slurry was 25%.

[0048] (2)C f / C-SiC composite material green body preparation: spread the carbon fiber felt / twill cloth on the porous metal mesh, and use the brushing method to evenly brush the slurry on the surface of the carbon fiber felt / twill cloth to make a single-layer mixed powder carbon fiber felt / twill cloth, Then the prepared single-layer mixed powder carbon fiber felt and carbon fiber twill are alternately stacked to four layers...

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Abstract

Belonging to the field of new materials, specifically high temperature / high purity, high temperature thermal field / load-bearing, frictional wear, corrosion-resistant materials and antioxidation materials in the fields of solar energy, semiconductors, metallurgy, energy, chemical industry, materials, machinery, transportation, spaceflight and aviation, etc., the invention provides a carbon fiber reinforced silicon carbide ceramic matrix composite material and a preparation method thereof. The preparation method includes: uniformly spraying or coating a silicon carbide slurry on the surfaces ofcarbon fiber felt and carbon fiber cloth, and then conducting alternate laminating, needling, drying and hot pressing curing to obtain a composite green blank; then carrying out carbonization on the composite green blank, and performing alternate infiltration deposition of pyrolytic carbon and silicon carbide on a boundary phase, and finally conducting pyrolytic carbon infiltration deposition anddensification treatment, thus obtaining the carbon fiber reinforced silicon carbide ceramic matrix composite material. The preparation method provided by the invention has the characteristics of shortpreparation period and low preparation cost, and the prepared carbon fiber reinforced silicon carbide ceramic matrix composite material has good uniformity, high strength and reliable performance.

Description

technical field [0001] The invention belongs to the field of new materials, specifically high-temperature / high-purity, high-temperature thermal field / load-bearing, friction and wear, corrosion-resistant, and anti-oxidation materials in the fields of solar energy, semiconductor, metallurgy, energy, chemical industry, materials, machinery, transportation, aerospace, etc. , particularly relates to a carbon fiber reinforced silicon carbide ceramic matrix composite material and a preparation method thereof. Background technique [0002] Carbon fiber reinforced silicon carbide ceramic matrix composites (C f / SiC composite material) has the advantages of low density, high temperature resistance, good mechanical properties and friction properties, thermal shock resistance and strong oxidation resistance. It is an ideal high-temperature structure and functional material in the fields of semiconductors, optoelectronics, energy and aerospace. At the same time, it is also a very potent...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/577C04B35/622
Inventor 不公告发明人
Owner 湖南兴晟新材料科技有限公司
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