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A kind of preparation method of carbon ceramic brake disc

A brake disc, carbon ceramic technology, applied in the direction of brake discs, etc., can solve the problem of low comprehensive performance of carbon ceramic materials

Active Publication Date: 2021-06-08
BEIJING TIANYISHANGJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to overcome the problem of low comprehensive performance of carbon ceramic materials in the prior art, and provide a carbon ceramic with excellent mechanical properties, high fracture toughness, good thermal conductivity, small thermal expansion coefficient and excellent thermal shock resistance ( Cf / SiC) composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Make the density 0.5g / cm 3 The 2.5D fiber prefabricated body is placed in a deposition furnace and fed with natural gas and hydrogen at a volume ratio of 1:10. The deposition temperature is 1000°C, the deposition time is 25 hours, and the deposition is performed 3 times to obtain a density of 0.85g / cm 3 semi-finished product I;

[0042] (2) Immerse the semi-finished product I in the impregnation solution A for 10 minutes, take it out and dry it, then place it in the impregnation solution B for 15 minutes, take it out, cure it at 190°C, and sinter it at 1000°C, repeat the steps of dipping, curing, and sintering in the impregnation solution B twice , resulting in a density of 1.85g / cm 3 semi-finished product II;

[0043] (3) Place the semi-finished product II in a corresponding metal container in a siliconizing furnace and heat it to 1500°C, put metal silicon and silicon alloy with a molar ratio of 1:5 in an intermediate frequency graphite crucible and heat it to 15...

Embodiment 2

[0051] (1) Make the density 0.45g / cm 3 The 2.5D fiber prefabricated body is placed in a deposition furnace and fed with natural gas and hydrogen at a volume ratio of 1:15. The deposition temperature is 1150°C, the deposition time is 40h, and the deposition is performed 3 times to obtain a density of 1.1g / cm 3 semi-finished product I;

[0052] (2) Immerse the semi-finished product I in the impregnating solution A for 15 minutes, take it out and dry it, and place it in the impregnating solution B for 20 minutes, take it out, cure it at 220°C, and sinter it at 1100°C, repeat the steps of dipping, curing, and sintering in the impregnating solution B once , resulting in a density of 1.88g / cm 3 semi-finished product II;

[0053] (3) Place the semi-finished product II in a corresponding metal container in a siliconizing furnace and heat it to 1600°C, put metal silicon and silicon alloy with a molar ratio of 1:8 in an intermediate frequency graphite crucible and heat it to 1750°C, a...

Embodiment 3

[0062] (1) Make the density 0.43g / cm 3 The 2.5D fiber prefabricated body is placed in a deposition furnace and fed with natural gas and hydrogen at a volume ratio of 1:14. The deposition temperature is 950°C, the deposition time is 30 h, and the deposition is performed 3 times to obtain a density of 0.89 g / cm 3 semi-finished product I;

[0063] (2) Immerse the semi-finished product I in the impregnating solution A for 15 minutes, take it out and dry it, and place it in the impregnating solution B for 25 minutes, take it out, cure it at 210°C, and sinter it at 1050°C to obtain a density of 1.86g / cm 3 semi-finished product II;

[0064] (3) Place the semi-finished product II in a corresponding metal container in a siliconizing furnace and heat it to 1600°C, put metal silicon and silicon alloy with a molar ratio of 1:2 in an intermediate frequency graphite crucible and heat it to 1600°C, and melt the melted Metal silicon and silicon alloy are transferred to a metal container and...

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Abstract

The invention belongs to the technical field of automobile brake systems, and in particular relates to a method for preparing a carbon ceramic brake disc. The preparation method of the carbon-ceramic brake disc of the present invention combines the vapor phase deposition method, the precursor impregnation method and the molten siliconizing method, and by limiting the types and amounts of solvents and gases in each step, and adjusting the parameters in the reaction, each method is realized. The advantages and disadvantages of each other complement each other to provide a carbon ceramic brake disc with excellent mechanical properties, high fracture toughness, good thermal conductivity, small thermal expansion coefficient, and excellent thermal shock resistance.

Description

technical field [0001] The invention belongs to the technical field of automobile brake systems, and in particular relates to a method for preparing a carbon ceramic brake disc. Background technique [0002] Carbon-ceramic brake material is a high-performance brake material developed after powder metallurgy materials and C / C composite materials in recent years. It has the advantages of low density, high strength, high hardness, high impact resistance, high temperature resistance (greater than 1200°C), oxidation resistance, and low thermal expansion coefficient. When used as a brake disc material, it also needs to have good toughness, ductility, and electrical conductivity. , thermal conductivity and other characteristics, it is recognized as the next generation of brake disc material. [0003] The existing carbon-ceramic (Cf / SiC) composites are usually prepared by chemical vapor infiltration (CVI) method, precursor impregnation pyrolysis (PIP) method, and molten silicon inf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/573C04B35/80C04B35/83F16D65/12
CPCF16D65/12C04B35/573C04B35/83C04B35/62873C04B2235/608C04B2235/616C04B2235/428C04B2235/40C04B2235/96C04B2235/9607
Inventor 吴佩芳释加才让范叶明党一纵崔新亮王灿解小花
Owner BEIJING TIANYISHANGJIA NEW MATERIAL
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