Producing method for carbon fiber reinforced ceramic matrix automobile brake pad

A manufacturing method and carbon fiber technology, which are applied in the field of automobile brake pads, can solve the problems of reduced adhesion, poor temperature resistance, rise, etc., and achieve improved service life and high temperature resistance, simple and feasible preparation method, and thermal decay performance. Good results

Inactive Publication Date: 2012-09-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the car is under continuous or emergency braking, the temperature of the friction surface of the brake pad and the brake disc rises rapidly, and the local "flash point" temperature can reach 1000°C. Due to the poor temperature resistance of the resin-based friction material, it will Decompose to release water, gas and oil, etc., and form a thin film between the two friction surfaces, making dry friction into mixed friction or wet friction, resulting in a significant decrease in friction coefficient (up to 40% to 50%), and brake failure Hidden dangers
In addition, because the carbonization of the resin at high temperature reduces its bonding effect, the high temperature wear of the resin-based friction material is aggravated, and the service life of the brake pad is significantly reduced.

Method used

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  • Producing method for carbon fiber reinforced ceramic matrix automobile brake pad
  • Producing method for carbon fiber reinforced ceramic matrix automobile brake pad
  • Producing method for carbon fiber reinforced ceramic matrix automobile brake pad

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) First, select carbon fibers with a length of 10 mm to 80 mm according to the ratio, and open them into fluffy single fibers through an opening device, then air-laid the opened carbon fibers into a web, and then use a web-laying machine to lay them into fibers The net is prefabricated into a single-layer mesh tire; then the single-layer tire mesh is superimposed layer by layer, and the carbon fiber bundle is introduced into the carbon fiber bundle perpendicular to the laying direction by a relay-type needle punching method to make a density of 0.20g / cm 3 full net tire;

[0035] (2) Under an argon protective atmosphere, the prefabricated body is subjected to a high-temperature heat treatment at 1600°C for 5 hours, and the pressure is a slight positive pressure, which is slightly higher than the zero scale of the vacuum pressure gauge, under the protection of an argon inert gas;

[0036] (3) Propylene is used as the carbon source gas, hydrogen is the dilution gas, and ...

Embodiment 2

[0045] (1) First, select carbon fibers with a length of 10 mm to 80 mm according to the ratio, and open them into fluffy single fibers through the opening equipment, then comb the opened carbon fibers into a web, and then lay them into fibers with a web lapper Net, prefabricated into a single-layer mesh tire; then the single-layer tire mesh is superimposed layer by layer, and the method of relay needle punching is used to introduce carbon fiber bundles perpendicular to the laying direction to make a density of 0.18g / cm 3 full net tire;

[0046] (2) The carbon fiber prefabricated body is subjected to a high-temperature heat treatment at 1800°C for 8 hours, and the pressure is a slight positive pressure, which is slightly higher than the zero scale of the vacuum pressure gauge, under the protection of argon inert gas;

[0047] (3) Natural gas is used as carbon source gas, hydrogen is used as diluent gas, and the volume ratio of natural gas and hydrogen is 1:3. Pyrolytic carbon i...

Embodiment 3

[0057] (1) First, select carbon fibers with a length of 10 mm to 80 mm according to the ratio, and open them into fluffy single fibers through the opening equipment, and then air-laid and carded the opened carbon fibers into a net, and then use the net laying The fiber net is machine-laid and prefabricated into a single-layer mesh tire; then the single-layer tire mesh is superimposed layer by layer, and the carbon fiber bundle is introduced into the carbon fiber bundle perpendicular to the laying direction by a relay-type needle punching method to make a density of 0.22g / cm 3 full net tire;

[0058] (2) The preform is subjected to 2000°C high-temperature heat treatment under an argon protective atmosphere, the whole time is 15 hours, the pressure is a slight positive pressure that is slightly higher than the zero scale of the vacuum pressure gauge, and the argon inert gas protection;

[0059] (3) Propylene is used as the carbon source gas, hydrogen is the dilution gas, and the...

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Abstract

The invention discloses a producing method for a carbon fiber reinforced ceramic matrix automobile brake pad. The method comprises the following steps of: preparing a carbon fiber mesh tire by a needling method; performing high temperature thermal process on the prepared carbon fiber mesh tire; preparing low-intensity carbon fiber reinforced matrix carbon (C / C) composite material by adopting an isothermal chemical vapor infiltration; machining the low-intensity C / C composite material, and performing directional infiltration in a high temperature vacuum furnace to prepare C / C-SiC brake linings; and then riveting the C / C-SiC braking linings with steel back to obtain the C / C-SiC braking pad used for the automobile braking system. The method provided by the invention has the advantages that the friction coefficient of the produced automobile brake pad is high and stable; the carbon fiber reinforced ceramic matrix automobile brake pad is low in wearing and good in heat fading performance; and thus, the method is simple and feasible.

Description

technical field [0001] The invention relates to an automobile brake pad, in particular to a brake pad of a carbon fiber reinforced ceramic-based friction material used in an automobile brake system, and a method for processing the brake pad and connecting it with a steel back. Background technique [0002] In the automobile braking system, the automobile brake pad is a key component of class A, and its performance is directly related to the safety and reliability of automobile operation. With the increase of the driving speed of modern automobiles, the requirements for automobile brake pads are becoming more and more stringent. Because the energy absorbed by automobile brake pads is proportional to the square of the speed, taking a car as an example, when braking at a speed of 50km / h, 100km / h and 200km / h, the heat load of braking is 282.61kJ, 1130.44 kJ and 4521.74kJ, the surface temperature of automobile brake pads is as high as 500-700°C. On the other hand, in order to e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/00C04B35/83
Inventor 李专肖鹏
Owner CENT SOUTH UNIV
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