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A carbon ceramic brake part and its preparation method

A technology for brake parts and carbon ceramics, applied in mechanical equipment, friction linings, etc., can solve the problems of low friction coefficient and uneven distribution of components, and achieve the effects of uniform distribution of components, good performance consistency and simple components.

Active Publication Date: 2019-12-13
BEIJING TIANYISHANGJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, what the present invention aims to solve is the defects of low friction coefficient and uneven component distribution in existing carbon ceramic brake parts, and further provides a high friction coefficient, good braking performance, uniform component distribution, and good performance consistency. Carbon-ceramic brake part with simple process and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment provides a carbon ceramic brake pad and a preparation method thereof. The carbon-ceramic brake pad includes silicon carbide, silicon and carbon fibers, and the mass ratio of the silicon carbide, the silicon and the carbon fibers is 50:14:30;

[0040] The preparation method of the carbon ceramic brake pad comprises the following steps:

[0041] (1) Preparation of carbon fiber mat body: first use the 12K carbon fiber latitude unidirectional carbon cloth and the 24K bidirectional carbon fiber carbon fiber cloth according to the latitude unidirectional carbon cloth direction 0 ° / 45 ° / 90 ° / 135 ° in sequence Superimposed on the steel back, and then use the barb thorns on the edge to needle the non-weft unidirectional carbon cloth and carbon fiber cloth. When the needle is inserted, the barbs will bring the fibers of the carbon fiber cloth to the vertical direction, so that The weft-free unidirectional carbon cloth and carbon fiber cloth are integrated a...

Embodiment 2

[0047] This embodiment provides a carbon ceramic brake pad and a preparation method thereof. The carbon-ceramic brake pad includes silicon carbide, silicon and carbon fibers, and the mass ratio of the silicon carbide, the silicon and the carbon fibers is 60:10:35;

[0048] The preparation method of the carbon ceramic brake pad comprises the following steps:

[0049] (1) Preparation of carbon fiber mat body: first use the 12K carbon fiber latitude unidirectional carbon cloth and the 24K bidirectional carbon fiber carbon fiber cloth according to the latitude unidirectional carbon cloth direction 0 ° / 45 ° / 90 ° / 135 ° in sequence Superimposed on the steel back, and then use the barb thorns on the edge to needle the non-weft unidirectional carbon cloth and carbon fiber cloth. When the needle is inserted, the barbs will bring the fibers of the carbon fiber cloth to the vertical direction, so that The weft-free unidirectional carbon cloth and carbon fiber cloth are integrated a...

Embodiment 3

[0055] This embodiment provides a carbon ceramic brake pad and a preparation method thereof. The carbon-ceramic brake pad includes silicon carbide, silicon and carbon fibers, and the mass ratio of the silicon carbide, the silicon and the carbon fibers is 40:18:25;

[0056] The preparation method of the carbon ceramic brake pad comprises the following steps:

[0057] (1) Preparation of carbon fiber mat body: first use the 12K carbon fiber latitude unidirectional carbon cloth and the 24K bidirectional carbon fiber carbon fiber cloth according to the latitude unidirectional carbon cloth direction 0 ° / 45 ° / 90 ° / 135 ° in sequence Superimposed on the steel back, and then use the barb thorns on the edge to needle the non-weft unidirectional carbon cloth and carbon fiber cloth. When the needle is inserted, the barbs will bring the fibers of the carbon fiber cloth to the vertical direction, so that The weft-free unidirectional carbon cloth and carbon fiber cloth are integrated a...

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Abstract

The invention discloses a carbon-ceramic brake part and a preparation method thereof. The carbon-ceramic brake part comprises silicon carbide, silicon and carbon fibers in a mass ratio of (40-60):(10-18):(25-35). The preparation method comprises the following steps: knitting or laminating the carbon fibers to form a carbon fiber blank; mixing polysilane, dibenzoyl peroxide and a silane coupling agent to form a silicon-containing precursor solution; dipping the carbon fiber blank into the silicon-containing precursor solution; after dipping is finished, taking out the carbon fiber blank, and solidifying and cracking sequentially in inert atmosphere, so as to obtain the carbon-ceramic brake part. The carbon-ceramic brake part prepared by adopting the preparation method has high friction coefficient, good braking performance, uniform component distribution and good performance consistency.

Description

technical field [0001] The invention belongs to the technical field of carbon-ceramic brake parts preparation, in particular to a carbon-ceramic brake part and a preparation method thereof, in particular to a carbon-ceramic brake part for rail transit and a preparation method thereof. Background technique [0002] The friction materials of traditional rail transit friction pairs (such as brake discs or brake pads) are mainly resin-based composite materials and powder metallurgy materials, and the brake discs of friction pairs are made of cast iron and cast steel. During the braking process of the train using this friction pair, when the braking temperature is too high, dust containing a large amount of resin will fall on it, and the resin in the dust will dissolve and fall down at about 300 degrees, sticking to the brake disc, On the brake pads and wheels, it affects the train running and braking effect. In addition, metal-based friction pairs will crack and suffer thermal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/571C04B35/622F16D69/02
CPCC04B35/571C04B35/622C04B35/806C04B2235/483C04B2235/5248C04B2235/5256C04B2235/616C04B2235/658C04B2235/77C04B2235/96F16D69/023
Inventor 吴佩芳李君君
Owner BEIJING TIANYISHANGJIA NEW MATERIAL
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