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Method for preparing c/sic material brake disc by using carbon fiber prepreg tape

A carbon fiber prepreg, brake disc technology, applied in 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 cost reduction

Active Publication Date: 2020-07-24
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 using carbon fiber prepreg tape, cutting the carbon fiber prepreg tape into a short carbon fiber tape with a length of 3-10mm and pressing it into a brake disc body, and then carbonizing the body to obtain a carbon / carbon prefabrication body, and finally the product is obtained through carburizing treatment. The carburizing treatment refers to placing the carbon / carbon preform in a graphite crucible and heating it at 1550-1650°C for 0.5- 2h, and then complete the carburizing treatment as the furnace cools down. The C / SiC composite material of the present invention has the advantages of low cost, short process cycle, no pollution, simple and controllable preparation process, etc. in the preparation of carbon-carbon preforms, and is expected to be widely used in C / SiC composite brake discs .

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 Patents(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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