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A one-step densification method for producing carbon-ceramic automobile brake discs

An automobile brake and densification technology, which is applied in the field of one-step densification production of carbon ceramic automobile brake discs, can solve the problems of low gas utilization rate, high cost, and long preparation process cycle, and overcome the long preparation cycle and density change small effect

Active Publication Date: 2018-07-24
ZHEJIANG ASIA PACIFIC MECHANICAL & ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the densification methods of carbon-ceramic composite materials mainly include the following types: (1) chemical vapor deposition method, the ceramic and carbon precursor gas is cracked at high temperature, and the ceramic and carbon are deposited on the carbon fiber preform to achieve densification (2) Liquid-phase impregnation method, impregnating carbon fiber in carbon precursor liquid, then solidifying and molding, then putting it into a high-temperature furnace for cracking, and finally using molten silicon to penetrate into the carbon-carbon green body to achieve the purpose of densification; the above In the process (1) the preparation process cycle is long, the gas utilization rate is low, the cost is high, and the surface pores are blocked in the later stage of deposition, and it needs to be processed and then deposited, and the process is complicated
Process (2) During the high-temperature pyrolysis process, due to the escape of pyrolysis gas, the porosity of the composite material is extremely high, and repeated impregnation-high-temperature pyrolysis cycles are required. The process takes a long time and the density is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053]Weave 1K carbon fiber tows into plain weave, and use hot-melt polypropylene to lock the edges to prevent fiber bundles from being misaligned. Mix graphite powder, silicon powder and resin powder and dissolve them in absolute ethanol. The mass ratio of graphite powder, silicon powder, resin powder and absolute ethanol is 30:20:30:70. Stir thoroughly so that there is no agglomerated powder in the solution material; the solution is uniformly coated on the surface of carbon fiber cloth in advance, and then fully dried at room temperature to obtain a carbon fiber prepreg; the carbon fiber prepreg is laminated, and the fiber arrangement direction of each layer is the same as that of the next layer Stagger the angle so that the fiber arrangement directions of the two adjacent layers are different; then place the laminated carbon fiber prepreg in the cavity of the molding mold, pressurize initially to a pressure of 10MPa, and keep the initial pressurized pressure to raise the tem...

Embodiment 2

[0055] Weave 3K carbon fiber tows into plain weave, and use hot-melt polypropylene to lock the edges to prevent fiber bundles from being misaligned. Mix and dissolve graphite powder, silicon powder and resin powder in absolute ethanol, the mass ratio of graphite powder, silicon powder, resin powder and absolute ethanol is 45:8:50:90, stir well so that there is no agglomerated powder in the solution material; the solution is uniformly coated on the surface of carbon fiber cloth in advance, and then fully dried at room temperature to obtain a carbon fiber prepreg; the carbon fiber prepreg is laminated, and the fiber arrangement direction of each layer is the same as that of the next layer Stagger the angle so that the fiber arrangement directions of the two adjacent layers are different; then place the laminated carbon fiber prepreg in the cavity of the molding mold, pressurize initially to a pressure of 10MPa, and keep the initial pressurized pressure to raise the temperature to...

Embodiment 3

[0057] Weave 1K carbon fiber tows into plain weave, and use hot-melt polypropylene to lock the edges to prevent fiber bundles from being misaligned. Mix and dissolve graphite powder, silicon powder and resin powder in absolute ethanol, the mass ratio of graphite powder, silicon powder, resin powder and absolute ethanol is 60:2:30:90, stir well so that there is no agglomerated powder in the solution material; the solution is uniformly coated on the surface of carbon fiber cloth in advance, and then fully dried at room temperature to obtain a carbon fiber prepreg; the carbon fiber prepreg is laminated, and the fiber arrangement direction of each layer is the same as that of the next layer Stagger the angle so that the fiber arrangement directions of the two adjacent layers are different; then place the laminated carbon fiber prepreg in the cavity of the molding mold, pressurize initially to a pressure of 10MPa, and keep the initial pressurized pressure to raise the temperature to...

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Abstract

The invention discloses a method for producing a carbon-ceramic automobile brake disc through one-step densification production. The method comprises mixing and dissolving graphite powder and silicon powder as additives and resin, coating a carbon fiber fabric obtained through weaving of carbon fiber filament bundles with the solution, carrying out airing and lamination, carrying out molding and carrying out processing charing to obtain a carbon fiber-reinforced ceramic composite material brake disc. Through use of graphite powder and silicon powder, the high-density carbon-ceramic composite material is prepared through one-step densification. The method solves the problem that the vapor deposition and liquid phase deposition methods have long preparation periods and difficultly controlled processes.

Description

technical field [0001] The invention relates to a method for producing automobile brake discs, in particular to a method for one-step densification production of carbon ceramic automobile brake discs. Background technique [0002] Disc brakes are currently the most commonly used brakes for passenger cars. They have the advantages of simple structure, quick response, stable effect, and easy maintenance. The brake disc is the core component of the disc brake system, and its performance determines the braking safety and driving comfort of the car. At present, the widely used disc brake material is cast iron, which has the advantages of easy processing and good wear resistance, but it also has the disadvantages of large mass, poor thermal stability, easy to rust, and loud braking noise. [0003] With the development of auto parts manufacturing technology, brake discs are developing in the direction of lighter weight, higher friction coefficient and better durability. Facing th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/65
CPCC04B35/65C04B35/83C04B2235/425C04B2235/428C04B2235/48C04B2235/5248C04B2235/5256C04B2235/60C04B2235/616
Inventor 赵伟施正堂杨鹏翱高洁
Owner ZHEJIANG ASIA PACIFIC MECHANICAL & ELECTRONICS
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