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Modified slurry for carbon-carbon brake disc and preparation method of carbon-carbon brake disc

A technology of carbon-carbon brake discs and modified slurry, which is applied in the field of preparation of carbon-carbon brake disc modified slurry and carbon-carbon brake discs, can solve high braking temperature, poor wet braking performance, and static friction of carbon-carbon brake discs Low coefficient and other problems, to achieve the effect of reducing brake temperature, improving wet friction performance, and improving overall performance

Inactive Publication Date: 2020-07-28
德翼高科(杭州)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a modified slurry for carbon-carbon brake discs and a preparation method for carbon-carbon brake discs, so as to solve the problems of low static friction coefficient, poor wet brake performance and high brake temperature of existing carbon-carbon brake discs.

Method used

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  • Modified slurry for carbon-carbon brake disc and preparation method of carbon-carbon brake disc

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: A carbon-carbon brake disc modified slurry, including a modifier with a mass percentage of 7-10%, a suspension agent with a mass percentage of 1-2%, and a mixture of deionized water with a mass percentage of 80-90% be made of. The suspending agent is sodium carboxymethylcellulose. The modifier includes graphite powder with a mass percentage of 10-15%, and B with a mass percentage of 20-35%. 4 C powder, silicon carbide powder with a mass percentage of 25-35% and carbon powder with a mass percentage of 30-40%. The graphite powder, B 4 The particle diameters of C powder, silicon carbide powder and carbon powder are all 1-5 μm.

Embodiment 2

[0022] Embodiment 2: a kind of preparation method of carbon-carbon brake disk, comprises the following steps:

[0023] 1) slurry preparation step, the graphite powder that is 11% by mass percentage, the B that mass percentage is 30% 4 C powder, silicon carbide powder with a mass percentage of 26% and carbon powder with a mass percentage of 33% are mixed to obtain a modifier; the modifier is added to deionized water to form a modified slurry, and carboxymethyl cellulose is added Sodium is used as slurry suspending agent; Wherein, the mass percentage of modifying agent is 8.9%, the mass percentage of suspending agent is 1.7%, and the mass percentage of deionized water is 89.4%;

[0024] 2) Perform the impregnation step on the brake disc prefabricated body, mix the modified slurry obtained in step 1) with furan resin or phenolic resin according to the ratio of 23% by mass: 77% to prepare an impregnant; then use vacuum pressure The impregnating agent is impregnated into the C / C b...

Embodiment 3

[0028] Embodiment 3: a kind of preparation method of carbon-carbon brake disk, comprises the following steps:

[0029] 1) slurry preparation step, the graphite powder that mass percentage is 13%, the B that mass percentage is 28% 4 C powder, silicon carbide powder with a mass percentage of 27% and carbon powder with a mass percentage of 32% are mixed to obtain a modifier; the modifier is added to deionized water to form a modified slurry, and carboxymethyl cellulose is added Sodium is used as slurry suspending agent; Wherein, the mass percentage of modifying agent is 9.5%, the mass percentage of suspending agent is 1.5%, and the mass percentage of deionized water is 89%;

[0030] 2) Impregnating the brake disc prefabricated body, mixing the modified slurry obtained in step 1) with the furan resin according to the ratio of 25% by mass: 75% to prepare an impregnating agent; then using a vacuum pressure process to impregnate The agent is impregnated into the C / C brake disc prefa...

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Abstract

The invention discloses modified slurry for a carbon-carbon brake disc and a preparation method of the carbon-carbon brake disc. The modified slurry is composed of a modifier, a suspending agent and deionized water, wherein the modifier is composed of graphite powder, B4C powder, silicon carbide powder and carbon powder in a mass percentage ratio of 10-15%: 20-35%: 25-35%: 30-40%. The modified slurry prepared in the invention and resin are mixed according to a mass percentage ratio of (20-30%): (70-80%) to prepare an impregnant; the prepared impregnant is infiltrated into a C / C brake disc prefabricated body by using a vacuum pressurizing process; then the brake disc prefabricated body is cured; CVD densification treatment is conducted on the cured brake disc prefabricated body; and finally, high-temperature heat treatment is performed to obtain a finished carbon-carbon brake disc product. According to the carbon-carbon brake disc manufactured through the technological method, various comprehensive properties of the carbon-carbon brake disc manufactured are effectively improved, and the carbon-carbon brake disc can be widely applied to the field of brake disc production and manufacturing.

Description

technical field [0001] The invention relates to the field of brake disc preparation technology, in particular to a carbon-carbon brake disc modified slurry and a preparation method of the carbon-carbon brake disc. Background technique [0002] Because C / C composite materials have outstanding advantages such as high specific strength, high specific modulus, low density, excellent thermal conductivity, high load-bearing capacity, and long service life, they have occupied an absolute dominant position in the aircraft brake market. However, with the expansion of the application scale, it is found that the C / C brake disc also has certain defects, which are manifested in the following aspects: [0003] (1) The coefficient of static friction is low, only 0.12-0.18. In order to meet the needs of static braking on the take-off line, on the basis of the normal braking of the aircraft at 7-10 MPa, a high-pressure static braking system of about 20 MPa needs to be added. The structure o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83F16D69/02C04B35/84
CPCC04B35/83C04B2235/3821C04B2235/3826C04B2235/425C04B2235/46C04B2235/656F16D69/02F16D2200/0052F16D2200/0082
Inventor 杜东伟
Owner 德翼高科(杭州)科技有限公司
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