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Carbon-ceramic brake material preparation method and carbon-ceramic brake disc preparation method

A brake material and brake disc technology, applied in the field of brake materials, can solve the problems of lower reliability than three-dimensional acupuncture structure, slow application and popularization speed, complicated preparation process, etc., achieve short preparation cycle, increase solid phase yield, and repeatable good sex effect

Active Publication Date: 2016-05-11
SHENZHEN LE MYTH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Carbon-ceramic brake materials have the above excellent properties, but the application and promotion speed is very slow, the main reason is that the cost is too high
At present, there are two methods of preparing carbon-ceramic brake materials: one is usually obtained by hot-pressing cracking of short-fiber prepregs, and then silicon infiltrated; but in this process, the fibers are first impregnated with resin, dried, chopped, and then Hot pressing cracking, the preparation process is complicated, and the short fiber reinforced carbon ceramic brake material is obtained, its performance is low, and its reliability is not as good as that of the three-dimensional acupuncture structure.
The other is to obtain the three-dimensional acupuncture preform by chemical vapor deposition pyrolysis and silicon infiltration; however, this process has a long production cycle and high cost, making it difficult to popularize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]Step 1, the preparation of the first carbon fiber prefabricated body; several layers of single-layer 0° no-weft fabric, tire mesh, 90° no-weft fabric, and tire mesh are sequentially superimposed to the design thickness, and prepared by a relay acupuncture method; Needling density is 30 needles / cm 2 , the bulk density is about 0.3g / cm 3 , wherein the volume ratio of the tire mesh layer to the non-woven fabric layer is about 1:1.

[0047] Step 2, preparation of phenolic resin solution: mixing thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine in a weight ratio of 1:1:1:0.1 to prepare a phenolic resin solution.

[0048] Step 3, preparation of a mixed slurry of phenolic resin and ceramic powder; adding ceramic powder whose main component is SiC and a particle size of 1 μm to the phenolic resin solution prepared in step 2, the amount of ceramic powder is 35wt% of the amount of phenolic resin solution; then Ammonia water and hydrochloric acid were adde...

Embodiment 2

[0058] Step 1, the preparation of the first carbon fiber prefabricated body; several layers of single-layer 0° no-weft fabric, tire mesh, 90° no-weft fabric, and tire mesh are sequentially superimposed to the design thickness, and prepared by a relay acupuncture method; Needling density is 30 needles / cm 2 , the bulk density is about 0.45g / cm 3 , wherein the volume ratio of the tire mesh layer to the non-woven fabric layer is about 1:2.

[0059] Step 2, preparation of phenolic resin solution: mixing thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine in a weight ratio of 2:1:1:0.2 to prepare a phenolic resin solution.

[0060] Step 3, the preparation of phenolic resin and ceramic powder mixed slurry; To the phenolic resin solution prepared in step 2, add main component to be B 4 C, particle size is the ceramic powder of 5 μm, and the amount of ceramic powder is 50wt% of the phenolic resin solution amount; Then drop into ammoniacal liquor and hydrochloric...

Embodiment 3

[0070] Step 1, the preparation of the first carbon fiber prefabricated body; several layers of single-layer 0° no-weft fabric, tire mesh, 90° no-weft fabric, and tire mesh are sequentially superimposed to the design thickness, and prepared by a relay acupuncture method; Needling density is 30 needles / cm 2 , the bulk density is about 0.4g / cm 3 , wherein the volume ratio of the tire mesh layer to the non-woven fabric layer is about 1:1.5.

[0071] Step 2, preparation of phenolic resin solution: mixing thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine at a weight ratio of 1.5:2:2:0.15 to prepare a phenolic resin solution.

[0072] Step 3, preparation of a mixed slurry of phenolic resin and ceramic powder; adding ceramic powder whose main component is BN and a particle size of 0.5 μm to the phenolic resin solution prepared in step 2, the amount of the ceramic powder is 35wt% of the amount of the phenolic resin solution; Then ammonia water and hydrochloric...

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Abstract

The present invention provides a carbon-ceramic brake material preparation method comprising the following steps: 1) preparing a first carbon fiber preform; 2) preparing a phenolic resin solution; 3) preparing phenolic resin and ceramic powder mixed slurry; 4 ) preparing a second carbon fiber preform; 5) drying the second carbon fiber preform; 6) hot pressing and curing of the dried preform; 7) cracking a carbon / phenolic-ceramic composite; and 8) processing a first porous carbon / carbon-ceramic powder composite material at high temperature. The present invention also provides a carbon-ceramic brake disc preparation method including the above eight steps, and further comprising the following steps: 9) pre-processing; 10) silicon infiltration processing of a first brake disc; and 11) final processing. The carbon-ceramic brake material preparation method greatly reduces the manufacturing cycle and cost of a carbon-ceramic brake material, and is simple in process, well reproducible, and suitable for industrial mass production.

Description

technical field [0001] The invention relates to the technical field of brake materials, in particular to a method for preparing a carbon ceramic brake material and a brake disc. Background technique [0002] As a new type of brake material, carbon ceramic brake material has the advantages of low density, stable friction coefficient, large brake ratio, no rust and long service life compared with traditional metal and semi-metal brake materials, especially for long-term No thermal fade during continuous braking. Compared with carbon-carbon brake materials, it has outstanding advantages such as excellent oxidation resistance, low attenuation of wet friction performance, high static friction coefficient and long life, which greatly improves the safety of brakes. It has broad application prospects in the braking fields of aircraft, tanks, high-speed trains and high-end cars. [0003] At present, the carbon-ceramic brake material of German SGL company has been successfully appli...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/84F16D65/12
CPCC04B35/83C04B41/009C04B41/5053C04B41/5058C04B41/5059C04B41/5064C04B41/87C04B2235/48F16D65/12F16D65/125F16D2200/0047C04B41/4535
Inventor 刘军
Owner SHENZHEN LE MYTH TECH CO LTD
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