Compound interface layer modified C/C composite material as well as preparation method and application thereof

A composite material and interface layer technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of friction material wear failure, friction surface stress concentration, weak interface bonding, etc., to achieve improved interface bonding, mechanical properties, low cost effect

Active Publication Date: 2017-06-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary carbon fibers, especially domestic carbon fibers, have smooth surfaces, are chemically inert, have poor wettability with matrix materials, weak interface bonding, and a large number of interface cracks. During the friction and wear process, it is easy to cause stress concentration on the friction surface, cracks and other defects. Diffusion, which eventually leads to wear failure of the friction material

Method used

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  • Compound interface layer modified C/C composite material as well as preparation method and application thereof
  • Compound interface layer modified C/C composite material as well as preparation method and application thereof
  • Compound interface layer modified C/C composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0063] (1) Soak the PAN-based T700 (12K) carbon cloth produced by Toray in Japan in 5% boric acid aqueous solution for 24 hours, keep the solution temperature at 80°C, and then dry it at 100°C for 4 hours.

[0064] (2) Arrange the carbon treated in step (1) in a graphitization furnace for pre-graphitization treatment, the graphitization temperature is 2500° C., and the holding time is 4 hours.

[0065] (3) Prepare a mixed solution with epoxy resin, alcohol, and nano-silicon carbide fibers in a mass ratio of 25:25:3, place the mixed solution in a water bath for heating at 65°C, and stir with a magnetic stirrer at the same time , to obtain a homogeneous mixed solution.

[0066] (4) Put the carbon cloth treated in step (2) into the mixed solution prepared in step (3) and soak for 40 minutes, and perform ultrasonic vibration, so that the nanofibers are evenly covered on the surface of the carbon fibers;

[0067] (5) Laminate the carbon cloth treated in step (4) in a self-made jig...

Embodiment 2

[0071] (1) Soak the PAN-based T700 (12K) carbon cloth produced by Toray in Japan in 7% boric acid aqueous solution for 28 hours, keep the temperature of the solution at 80°C, and then dry it at 110°C for 3 hours.

[0072] (2) Arrange the carbon treated in step (1) in a graphitization furnace for pre-graphitization treatment, the graphitization temperature is 2600° C., and the holding time is 4 hours.

[0073] (3) Prepare a mixed solution with epoxy resin, alcohol, and nano-silicon carbide fibers in a mass ratio of 25:25:5, place the mixed solution in a water bath for heating at 80°C, and stir with a magnetic stirrer at the same time , to obtain a homogeneous mixed solution.

[0074] (4) Put the carbon cloth treated in step (2) into the mixed solution prepared in step (3) and soak for 50 minutes, and perform ultrasonic vibration, so that the nanofibers evenly cover the surface of the carbon fibers;

[0075] (5) Laminate the carbon cloth treated in step (4) in a self-made jig t...

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Abstract

The invention relates to a compound interface layer modified C/C composite material as well as a preparation method and an application thereof, in particular to a carbon fiber/matrix carbon interface modified C/C composite material as well as a preparation method and an application thereof. The compound interface layer modified C/C composite material comprises carbon fibers, B-containing graphite layer, a SiC layer and a pyrolytic carbon layer, wherein the carbon fibers are coated with the B-containing graphite layer, the SiC layer is located between the B-containing graphite layer and the pyrolytic carbon layer, the B-containing graphite layer is coated with the SiC layer which is coated with the pyrolytic carbon layer, and the pyrolytic carbon layer contains graphite. The preparation method of the compound interface layer modified C/C composite material comprises the following steps: the carbon fibers dipped in boric acid aresubjected to first graphitization treatment, the treated carbon fibers are then coated with nano-SiC fibers, CVI densification is performed, and finally, graphitization treatment is performed once more. The composite material is reasonable in structural design, the preparation process is simple and easy to control, and the obtained product has excellent performance and is particularly applicable to friction materials.

Description

technical field [0001] The invention relates to a composite interface layer modified C / C composite material and its preparation method and application, in particular to a carbon fiber / matrix carbon interface modified C / C composite material and its preparation method and application. Background technique [0002] Carbon fiber reinforced carbon base (abbreviated as carbon / carbon, specifically C / C in this invention) composite material is a new type of high-performance composite material with high specific modulus, high specific strength, high temperature resistance, corrosion resistance, and thermal shock resistance. It is widely used in braking systems in aviation, aerospace and other fields, and is a representative of a new generation of high-temperature friction materials. With the rapid development of my country's aerospace technology and the continuous improvement of spacecraft performance, higher and higher requirements are put forward for its braking system. The developm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C09K3/14
CPCC04B35/806C04B35/83C04B2235/3826C04B2235/77C04B2235/96C04B2235/9607C09K3/14
Inventor 陈洁熊翔刘如铁
Owner CENT SOUTH UNIV
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