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Carbon fiber enhanced carbon-silicon carbide friction material as well as preparation method and application thereof

A technology of friction material and carbon fiber prefabricated body, which is applied in the field of carbon fiber reinforced carbon-silicon carbide friction material and its preparation, and can solve the problems of difficult control of porous carbon/carbon body density and porosity, low carbon yield, and long impregnation cycle and other problems, to achieve the effect of enhancing interlayer shear performance, improving friction stability, and improving distribution uniformity

Inactive Publication Date: 2019-01-11
广州晶石创业投资管理合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For pitch impregnation, the pitch carbon yield is higher, which has great advantages in the preparation of high-density carbon / carbon composites, but the density and open porosity of the porous carbon / carbon body are difficult to control, and high-pressure carbonization is required to prevent Pitch reverse osmosis; in addition, pitch carbon, similar to pyrolytic carbon, is mainly distributed on the surface of carbon fibers and fiber bundles, and it is easy to form closed pores inside the porous carbon / carbon body, and the residual silicon content after fusion siliconizing is relatively high; therefore, pitch Not suitable as an impregnating agent alone for the preparation of porous carbon / carbon bodies
For resin impregnation, resin carbon has agglomeration characteristics and is mainly distributed in the center of the fiber preform pores, which cannot effectively protect carbon fibers; in addition, its relatively low carbon yield compared with asphalt leads to relatively long impregnation cycle and high cost

Method used

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  • Carbon fiber enhanced carbon-silicon carbide friction material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0044] This embodiment 1 provides a method for preparing a carbon fiber reinforced carbon-silicon carbide friction material, which includes the following steps:

[0045] (1) Weaving and forming of carbon fiber prefabricated body:

[0046] Using the non-weft cloth and the net tire as the matrix ply structure unit, layer by layer and continuous needle punching to form a carbon fiber prefabricated body with a carbon fiber integral needle felt structure; wherein, the volume density of the obtained carbon fiber prefabricated body is 0.42g / cm 3 , the needling density is 30 needles / cm 2 ; The mass ratio of the weft-free fabric to the mesh tire is 7:3, the weft-free fabric adopts a 0° / 45° / 90° layering method, and the interlayer density of the weft-free fabric is 12 layers / cm;

[0047] (2) High temperature heat treatment of carbon fiber preform:

[0048] Load the carbon fiber prefabricated body produced in step (1) into a high-temperature furnace, and perform a high-temperature heat ...

Embodiment 2

[0062] This embodiment 2 provides a method for preparing a carbon fiber reinforced carbon-silicon carbide friction material, which includes the following steps:

[0063] (1) Weaving and forming of carbon fiber prefabricated body:

[0064] Using the non-weft cloth and the mesh tire as the matrix ply structure unit, layer by layer and continuous needle punching to form a carbon fiber prefabricated body with a carbon fiber integral needle felt structure; wherein, the volume density of the obtained carbon fiber prefabricated body is 0.52g / cm 3 , the needling density is 40 needles / cm 2 ; The mass ratio of the weft-free fabric to the mesh tire is 4:1, the weft-free fabric adopts a 0° / 45° / 90° layering method, and the interlayer density of the weft-free fabric is 15 layers / cm;

[0065] (2) High temperature heat treatment of carbon fiber preform:

[0066] Load the carbon fiber prefabricated body produced in step (1) into a high-temperature furnace, and perform a high-temperature heat...

Embodiment 3

[0080] This embodiment 3 provides a method for preparing a carbon fiber reinforced carbon-silicon carbide friction material, which includes the following steps:

[0081] (1) Weaving and forming of carbon fiber prefabricated body:

[0082] Using the non-weft cloth and the mesh tire as the matrix ply structure unit, layer by layer and continuous needle punching to form a carbon fiber prefabricated body with a carbon fiber integral needle felt structure; wherein, the volume density of the obtained carbon fiber prefabricated body is 0.45g / cm 3 , the needling density is 40 needles / cm 2 ; The mass ratio of the weft-free fabric to the mesh tire is 3:1, the weft-free fabric adopts a 0° / 45° / 90° layering method, and the interlayer density of the weft-free fabric is 14 layers / cm;

[0083] (2) High temperature heat treatment of carbon fiber preform:

[0084] Load the carbon fiber prefabricated body produced in step (1) into a high-temperature furnace, and perform a high-temperature heat...

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Abstract

The invention discloses a preparation method of a carbon fiber enhanced carbon-silicon carbide friction material, belonging to the preparation field of carbon fiber enhanced carbon-silicon carbide composite materials. The preparation method comprises the following steps: (1) weaving a carbon fiber preform for formation; (2) carrying out high-temperature thermal treatment on the carbon fiber preform; (3) preparing an asphalt-resin mixed impregnant; (4) carrying out dipping, curing and carbonization on the asphalt-resin mixed impregnant; (5) preparing resin / carbon powder dipping precursor; (6) carrying out dipping, curing and carbonization on the resin / carbon powder dipping precursor; (7) carrying out high-temperature thermal treatment on a porous carbon / carbon blank; and (8) carrying out fusion siliconing on the porous carbon / carbon blank, so as to obtain the carbon fiber enhanced carbon-silicon carbide friction material. The preparation method is simple and controllable in process, short in preparation period and strong material structure designability, and the prepared friction material can be applied to automobile brake discs (pieces), high-speed train brake shoes and magnetically levitated train runners.

Description

technical field [0001] The invention relates to the technical field of carbon fiber reinforced carbon-silicon carbide composite materials, in particular to a carbon fiber reinforced carbon-silicon carbide friction material and its preparation method and application. Background technique [0002] Friction material (braking material) refers to the active use of its friction characteristics to improve the friction and wear performance. It is used in the friction part of the friction clutch and friction brake to realize the transmission and blocking of power, and the deceleration and stop of moving objects. s material. Carbon fiber reinforced carbon-silicon carbide composite materials as brake materials not only inherit the advantages of carbon / carbon brake materials such as low density, smooth braking, low wear weight loss and large heat capacity, but also overcome the high hygroscopicity and wet friction of carbon / carbon brake materials. Low coefficient, low coefficient of st...

Claims

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Application Information

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IPC IPC(8): C04B35/573C04B35/80C04B35/83C04B35/622
CPCC04B35/806C04B35/573C04B35/622C04B35/83C04B2235/48C04B2235/5248C04B2235/5256C04B2235/77C04B2235/96
Inventor 熊翔王雅雷陈招科孙威曾毅吕东泽
Owner 广州晶石创业投资管理合伙企业(有限合伙)
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