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Method for preparing C/SiC material brake disc by carbon fiber prepreg tape

A technology of carbon fiber prepreg and brake discs, which is applied in the direction of mechanical equipment, friction linings, etc., can solve the problems of high cost and long process cycle, and achieve the effect of low cost, short process cycle and no pollution in the preparation process

Active Publication Date: 2018-01-12
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] In order to solve the existing problems of long process cycle and high cost when using carbon fiber composite materials to make brake discs, the present invention provides a method for preparing C / SiC material brake discs by using carbon fiber prepreg tape. The method utilizes carbon fiber prepreg Tape is used as raw material for production, which has the advantages of short process cycle, programmable fiber content, convenient operation and high reliability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The method for preparing a C / SiC material brake disc by using a carbon fiber prepreg tape, the steps are as follows:

[0044] 1) Shorten the continuous carbon fiber prepreg tape to obtain chopped carbon fiber with a length of 3mm;

[0045] 2) Put the chopped carbon fiber in the mold cavity, and then put it in the mechanical vibration table, set the vibration power to 1.2KW, the vibration frequency to 300HZ, the amplitude to 3mm, and the vibration time to 30min;

[0046] 3) Take out the mold cavity from the mechanical vibrating table, place it on a press for molding, the molding pressure is 150MPa, and carbonize the obtained green body at 800°C for 3 hours to obtain a carbon / carbon preform;

[0047] 4) Embed the carbon / carbon prefabricated body with silicon powder, place it in a graphite crucible, and keep it at 1650°C for 2 hours under the protection of vacuum or inert atmosphere, and then cool down with the furnace;

[0048] 5) Take out the green body obtained in the ...

Embodiment 2

[0050] The method for preparing a C / SiC material brake disc by using a carbon fiber prepreg tape, the steps are as follows:

[0051] 1) Shorten the continuous carbon fiber prepreg tape to obtain chopped carbon fiber with a length of 10mm;

[0052] 2) Put the chopped carbon fiber in the mold cavity, and then put it in the mechanical vibration table, set the vibration power to 1.2KW, the vibration frequency to 300HZ, the amplitude to 3mm, and the vibration time to 30min;

[0053] 3) Take out the mold cavity from the mechanical vibrating table, place it on a press for molding, the molding pressure is 250MPa, and carbonize the obtained body at 1000°C for 1 hour to obtain a carbon / carbon preform;

[0054] 4) Embed the carbon / carbon prefabricated body with silicon powder, place it in a graphite crucible, and keep it at 1650°C for 0.5 h under the protection of vacuum or inert atmosphere, and then cool down with the furnace;

[0055] 5) Take out the green body obtained in the graphit...

Embodiment 3

[0057] The method for preparing a C / SiC material brake disc by using a carbon fiber prepreg tape, the steps are as follows:

[0058] 1) Shorten the continuous carbon fiber prepreg tape to obtain chopped carbon fiber with a length of 6mm;

[0059] 2) Put the chopped carbon fiber in the mold cavity, and then put it in the mechanical vibration table, set the vibration power to 1.2KW, the vibration frequency to 300HZ, the amplitude to 3mm, and the vibration time to 30min;

[0060] 3) Take out the mold cavity from the mechanical vibrating table, put it on a press for molding, the molding pressure is 200MPa, and carbonize the obtained green body at 900°C for 2 hours to obtain a carbon / carbon preform;

[0061] 4) Embed the carbon / carbon prefabricated body with silicon powder, place it in a graphite crucible, and keep it at 1600°C for 1.5h under the protection of vacuum or inert atmosphere, and then cool down with the furnace;

[0062] 5) Take out the green body obtained in the graph...

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Abstract

A method for preparing a C / SiC material brake disc by a carbon fiber prepreg tape comprises the following steps: clipping the carbon fiber prepreg tape into a short carbon fiber tape with the length of 3-10 mm and pressing the short carbon fiber tape into a brake disc blank; carbonizing the blank to obtain a carbon / carbon preform; and finally carrying out carburizing treatment to obtain a product.Carburizing treatment comprises the steps of placing the carbon / carbon preform in a graphite crucible; heating the carbon / carbon preform for 0.5-2 hours at the temperature of 1,550-1,650 DEG C undervacuum or in an inert atmosphere; and then cooling the carbon / carbon preform in a furnace to finish carburizing treatment. A C / SiC composite material has the advantages of low cost, short process period, pollution-free preparation process, simplicity and controllability and the like on preparation of the carbon / carbon preform, and is expected to be extensively applied to a C / SiC composite brake disc.

Description

technical field [0001] The invention relates to the field of silicon carbide ceramic-based composite materials, in particular to a method for preparing a C / SiC material brake disc by using a carbon fiber prepreg tape. Background technique [0002] C / C, C / C-SiC and C / SiC composite materials have been more and more widely studied due to their advantages of high temperature resistance, corrosion resistance, light weight, stable friction and wear performance, and high mechanical strength, and have been successfully applied to In the fields of aerospace, high-speed trains and racing cars, for example, the most widely used application is in the brake discs of various models. [0003] C-SiC materials used to make brake discs are generally prepared in the following ways. One is to prepare SiC and C preforms with different charges respectively, and then sinter the two to obtain C-SiC materials. CN104311034A and patent CN104387069A: [0004] CN104311034A discloses a method for prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/80C04B35/622C04B35/65F16D69/02
Inventor 陈智勇姚永玉李妙玲程广伟刘建寿
Owner LUOYANG INST OF SCI & TECH
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