A kind of preparation method of high temperature resistance and anti-oxidation heat conduction carbon fiber/silicon carbide composite material

A composite material and carbon fiber technology, which is applied in the field of preparation of high-temperature resistant and oxidation-resistant thermally conductive carbon fiber/silicon carbide composite materials, can solve the problems of weak interaction and low thermal conductivity, and achieve simple methods, enhanced thermal conductivity, excellent high resistance Effect

Active Publication Date: 2018-07-13
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the defects of weak interfacial interaction and low thermal conductivity of existing carbon fiber / silicon carbide composite materials, and provides a method for improving interfacial interaction and thermal conductivity of carbon fiber / silicon carbide composite materials

Method used

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  • A kind of preparation method of high temperature resistance and anti-oxidation heat conduction carbon fiber/silicon carbide composite material
  • A kind of preparation method of high temperature resistance and anti-oxidation heat conduction carbon fiber/silicon carbide composite material
  • A kind of preparation method of high temperature resistance and anti-oxidation heat conduction carbon fiber/silicon carbide composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] After cleaning and drying the carbon fiber fabric, place it in a tube furnace, raise the temperature to 700°C at a rate of 5°C / min in an Ar atmosphere, and keep the temperature constant for 0.5h to remove the polymer coating on the surface of the carbon fiber fabric when it leaves the factory. Soak the degummed carbon fiber fabric in 0.05mol / L Fe(NO 3 ) 3 in solution. After soaking for 0.5h, take it out and dry it. The catalyst-loaded carbon fibers were placed in a tube furnace. Argon was introduced (the flow rate was 200 sccm), and the temperature was raised to 400° C. at a rate of 5° C. / min. Reduce the flow of Ar to 100sccm and feed H at the same time 2(The flow rate is 200 sccm). After 10 minutes, increase the Ar flow rate to 350 sccm and decrease the H 2 The flow rate is 20 sccm. The temperature was raised to 750°C at a rate of 5°C / min. The carbon source (ethanol:xylene = 1:1) was introduced, the injection speed was 20ml / h, and the growth time was 10min. Tu...

Embodiment 2

[0034] After cleaning and drying the carbon fiber fabric, place it in a tube furnace, raise the temperature to 750°C at a rate of 10°C / min in an Ar atmosphere, and keep the temperature for 1h to remove the polymer coating on the surface of the carbon fiber fabric when it leaves the factory. Soak the degummed carbon fiber fabric in 0.1mol / L Fe(NO 3 ) 3 in solution. After soaking for 1 hour, take it out and dry it. The catalyst-loaded carbon fibers were arranged in a tube furnace. Argon was introduced (the flow rate was 300 sccm), and the temperature was raised to 450° C. at a rate of 10° C. / min. Reduce the Ar flow rate to 150 sccm and feed H at the same time 2 (The flow rate is 250 sccm). After 20min, increase the Ar flow to 380sccm and decrease the H 2 The flow rate is 35 sccm. The temperature was raised to 800°C at a rate of 10°C / min. The carbon source (ethanol:xylene = 1:1) was introduced, the injection speed was 20ml / h, and the growth time was 30min. Turn off H aft...

Embodiment 3

[0036] After cleaning and drying the carbon fiber fabric, place it in a tube furnace, raise the temperature to 800°C at a rate of 15°C / min under an Ar atmosphere, and keep the temperature constant for 2 hours to remove the polymer coating on the surface of the carbon fiber fabric when it leaves the factory. Soak the degummed carbon fiber fabric in 0.3mol / L Fe(NO 3 ) 3 in solution. After soaking for 2 hours, take it out and dry it. The catalyst-loaded carbon fibers were placed in a tube furnace. Argon was introduced (the flow rate was 400 sccm), and the temperature was raised to 500° C. at a rate of 15° C. / min. Reduce the flow of Ar to 200sccm and feed H at the same time 2 (The flow rate is 300 sccm). After 30 minutes, increase the Ar flow rate to 400 sccm and decrease the H 2 The flow rate is 50 sccm. The temperature was raised to 850°C at a rate of 15°C / min. The carbon source (ethanol:xylene = 1:1) was introduced, the injection speed was 20ml / h, and the growth time wa...

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Abstract

The invention relates to a preparation method of a high-temperature-resistant oxidation-resistant heat-conducting carbon fiber / silicon carbide composite material. The preparation method comprises the following steps: immersing carbon fiber fabrics in a Fe(NO3)3 solution, and drying; putting the catalyst-carried carbon fiber fabrics in a tube furnace; introducing Ar and H2; introducing a carbon source, and obtaining the carbon-nanotube-grown carbon fiber fabrics after the growth finishes; laminating 4-8 carbon fiber fabrics, and immersing in a polycarbosilane dimethylbenzene solution; taking out the laminated carbon fiber fabrics, and drying to form a block; carrying out oxidation in a muffle furnace for 1-2 hours; and putting the block into the tube furnace, introducing Ar, heating to 1200 DEG C, and cooling to obtain the high-temperature-resistant oxidation-resistant heat-conducting carbon fiber / silicon carbide composite material. The carbon fiber / silicon carbide composite material has favorable mechanical properties: the bending strength can reach 115 MPa or above, and the compression strength can reach 450 MPa or above. The method is simple, and has the advantages of low cost and low energy consumption.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature-resistant and anti-oxidation heat-conducting carbon fiber / silicon carbide composite material, in particular to a method for preparing a carbon fiber and silicon carbide composite material. Background technique [0002] With the rapid development of science and technology, efficient heat conduction and heat dissipation have become key issues in the field of thermal management. For example, with the continuous improvement of the integration of electronic components in electrical appliances, the continuous increase in the heat generated by the electronic devices per unit area will cause a sudden increase in the heat generated by the system. If there is no adequate thermal management guarantee, it is very easy to cause premature aging or damage of related devices. Traditional metal heat-conducting materials (such as aluminum, copper, etc.) have been difficult due to the limitations of high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/80C04B35/622
CPCC04B35/571C04B35/622C04B35/806C04B2235/483C04B2235/5248C04B2235/5256C04B2235/614C04B2235/616C04B2235/96C04B2235/9607
Inventor 封伟陈松超冯奕钰秦盟盟
Owner TIANJIN UNIV
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