Making method of high-toughness porous SiC ceramic complex part

A complex part, high toughness technology, applied in the field of rapid manufacturing of complex structural parts, can solve the problems of difficult control of pore shape, low strength and toughness, low porosity, etc., to achieve controllable structure and performance of parts, superior bending resistance Strength, the effect of improving the performance of parts

Inactive Publication Date: 2014-04-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of porous silicon carbide ceramics has problems such as relatively high sintering temperature, low porosity, difficult control of pore shape, small specific surface area, low strength and toughness, etc., which restrict the wide application of porous silicon carbide ceramic parts.

Method used

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  • Making method of high-toughness porous SiC ceramic complex part
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  • Making method of high-toughness porous SiC ceramic complex part

Examples

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Effect test

Embodiment 1

[0042] see figure 1 , a preparation method of high-toughness porous SiC ceramic complex parts, comprising the following steps:

[0043] 1. Using light-curing rapid prototyping technology to realize the manufacture of negative molds for complex parts; Figure 2-1~2-2 Shown is the filter for the internal design topology network channel, image 3 Molds and prototypes for the prepared parts;

[0044] 2. Raw material preparation: Mix phenolic resin and pore-forming agent (triethylene glycol) uniformly in a mass ratio of 50:80~100 to obtain resin slurry (hereinafter referred to as slurry);

[0045] 3. Ball mill the prepared slurry for 30 minutes, add curing agent (benzenesulfonyl chloride), stir in vacuum for 30 minutes to remove foam, and inject the slurry into the resin mold in the vacuum injection molding machine, and then put the cast parts into Insulate in a drying oven at 60°C for 8 hours, then increase the temperature at a rate of 2°C / h to 160°C for curing. After the pheno...

Embodiment 2

[0053] A method for preparing a high-toughness porous SiC ceramic complex part, comprising the following steps:

[0054] 1. Using light-curing rapid prototyping technology to realize the manufacture of negative molds for complex parts;

[0055] 2. Raw material preparation: Mix phenolic resin and pore-forming agent (triethylene glycol) uniformly in a mass ratio of 50:60~70 to obtain resin slurry (hereinafter referred to as slurry);

[0056] 3. Ball mill the prepared slurry for 30 minutes, add curing agent (benzenesulfonyl chloride), stir in vacuum for 30 minutes to remove foam, and inject the slurry into the resin mold in the vacuum injection molding machine, and then put the cast parts into Insulate in a drying oven at 80°C for 5 hours, then increase the temperature at a rate of 2°C / h to 180°C for curing. After the phenolic resin is completely cured, put the parts into a 20wt% potassium hydroxide-ethanol solution (ethanol: water = 2 :6), the photosensitive resin mold was corr...

Embodiment 3

[0064] A method for preparing a high-toughness porous SiC ceramic complex part, comprising the following steps:

[0065] 1. Using light-curing rapid prototyping technology to realize the manufacture of negative molds for complex parts;

[0066] 2. Raw material preparation: Mix phenolic resin and pore-forming agent (triethylene glycol) uniformly in a mass ratio of 50:60~75 to obtain resin slurry (hereinafter referred to as slurry);

[0067] 3. Ball mill the prepared slurry for 30 minutes, add curing agent (benzenesulfonyl chloride), stir in vacuum for 30 minutes to remove foam, and inject the slurry into the resin mold in the vacuum injection molding machine, and then put the cast parts into Insulate in a drying oven at 80°C for 5 hours, then increase the temperature at a rate of 1.5°C / h to 150°C for curing. After the phenolic resin is completely cured, put the parts into a 15wt% potassium hydroxide-methanol solution (ethanol: water = 2 :3), the photosensitive resin mold was c...

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Abstract

The invention discloses a making method of a high-toughness porous SiC ceramic complex part. A light-cured rapid forming technology is adopted to make a resin die of the complex part, a high-residual carbon resin slurry is casted, cured and pyrolyzed to make a porous carbon perform, silicon-carbon reaction sintering and high-temperature vacuum silicon discharge technologies are adopted to make a porous SiC complex part, and matrix aperture internal SiC nanowires are made through a microwave heating process to realize the toughening purpose. The method has the advantages of free forming of the complex structure, uniform and controllable aperture, high specific surface area, high fracture toughness, high-temperature resistance, anti-oxidation and the like.

Description

technical field [0001] The invention belongs to the technical field of rapid manufacturing of parts with complex structures, and relates to a method for preparing complex parts of high-toughness porous SiC ceramics. Background technique [0002] Porous silicon carbide ceramics are very attractive among porous materials due to their low density, small thermal expansion coefficient, high temperature resistance, corrosion resistance, oxidation resistance and long service life. At present, the preparation of porous silicon carbide ceramics has problems such as relatively high sintering temperature, low porosity, difficult control of pore shape, small specific surface area, low strength and toughness, etc., which restrict the wide application of porous silicon carbide ceramic parts. Contents of the invention [0003] The problem to be solved by the present invention is to provide a method for preparing complex parts of high-toughness porous SiC ceramics. On the basis of rapid p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/565C04B35/622
Inventor 鲁中良李涤尘陆峰曹继伟王嵽显卢秉恒
Owner XI AN JIAOTONG UNIV
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