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Repairing method of carbon ceramic brake-disc coating

A brake disc and carbon ceramic technology, which is applied in the field of carbon ceramic brake disc coating online repair, can solve the problems of surface coating damage, affecting the protective effect of the coating, restricting online repair behavior, etc., achieving simple process, preventing oxidation, low cost effect

Active Publication Date: 2013-04-17
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem is that the surface coating of the brake disc will be damaged to a certain extent during the equipment process, which will affect the protective effect of the coating and affect the normal use of carbon ceramic materials.
[0005] There are many coating preparation technologies at present, but none of them can be repaired online. For example, the sol-gel method requires high temperature treatment to form a coating, which limits its online repair behavior.

Method used

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  • Repairing method of carbon ceramic brake-disc coating
  • Repairing method of carbon ceramic brake-disc coating
  • Repairing method of carbon ceramic brake-disc coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Ultrasonic cleaning of the carbon ceramic brake disc material to be repaired with clean water for 30 minutes, then placed in an oven at 100°C for 30 minutes to dry, and then used;

[0032] Step 2: Add 80-100% ethanol as a solvent to B-Si glass powder, add 15-25% polyazide as a binder, add 15-25% aluminum hydroxide as a solid filler, and ball mill for about 10 -15min to obtain a uniformly mixed slurry;

[0033] Step 3: Brush the uniformly mixed slurry on the surface of the substrate, and cure it for about 5-6 hours at 120°C (infrared lamps can be used on site), so as to obtain the inner coating;

[0034] Step 4: Add 80-100% ethanol as a solvent to Bi glass powder, add 15-25% polyazide as a binder, and ball mill for about 10-15 minutes to obtain a uniformly mixed slurry;

[0035] Step 5: Brush the uniformly mixed slurry on the inner coating prepared in steps 2 and 3, and cure it completely at 120°C (infrared lamps can be used on site) for about 5-6 hours to obtai...

Embodiment 2

[0040] Step 1: Ultrasonic cleaning of the carbon ceramic brake disc material to be repaired with clean water for 30 minutes, then placed in an oven at 100°C for 30 minutes to dry, and then used;

[0041] Step 2: Add 80-100% ethanol to B-Si glass powder as a solvent, add 15-25% polysiloxane and polysiloxane (mass ratio is 1:1) as a binder, add 15-25 % aluminum hydroxide as a solid filler, ball milled for about 10-15 minutes to obtain a uniformly mixed slurry;

[0042] Step 3: Brush the uniformly mixed slurry on the surface of the substrate, and cure it for about 5-6 hours at 120°C (infrared lamps can be used on site), so as to obtain the inner coating;

[0043] Step 4: Add 80-100% ethanol to Bi glass powder as a solvent, add 15-25% polysiloxane and polysiloxane (mass ratio is 1:1) as a binder, and ball mill for about 10-15min, Obtain a homogeneous slurry;

[0044] Step 5: Brush the uniformly mixed slurry on the inner coating prepared in steps 2 and 3, and cure it completely a...

Embodiment 3

[0049] Step 1: Ultrasonic cleaning of the carbon ceramic brake disc material to be repaired with clean water for 30 minutes, then placed in an oven at 100°C for 30 minutes to dry, and then used;

[0050] Step 2: Add 80-100% ethanol as solvent to B-Si glass powder, add 20% polycarbosilane as binder, add 15-25% aluminum hydroxide as solid filler, and ball mill for about 10-15min , to obtain a uniformly mixed slurry;

[0051] Step 3: Brush the uniformly mixed slurry on the surface of the substrate, and cure it for about 5-6 hours at 120°C (infrared lamps can be used on site), so as to obtain the inner coating;

[0052] Step 4: Add 80%-100% ethanol as a solvent to Pb glass powder, add 20% polycarbosilane as a binder, add 15-25% aluminum hydroxide as a solid filler, and ball mill for about 10-15min. Obtain a homogeneous slurry;

[0053] Step 5: Brush the uniformly mixed slurry on the inner coating prepared in steps 2 and 3, and make it completely cured after about 10-12 hours at ...

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Abstract

The invention relates to a repairing method of a carbon ceramic brake-disc coating. Technical characteristics of the invention comprise that: a carbon ceramic brake-disc requiring reparation is subject to ultrasonic washing; mixed slurries composed of three types of glass powders with different softening points, a solvent, organic silane and a solid filling object are prepared; the brake-disc is respectively coated by three layers, which are an inner coating layer, a middle coating layer and an outer coating layer; the coating layers are cured, such that the reparation of the carbon ceramic brake-disc is finished. With the method provided by the invention, a prepared glass coating has a high compactness; the process stability is good; a preparation period is short, and the oxidation resistance of a composite material can be effectively improved. Also, the method is a low-temperature coating preparation technology. With the method provided by the invention, a good anti-oxidative effectcan be provided for a carbon-fiber-reinforced carbon substrate composite material (a C / C composite material) and a carbon-fiber-reinforced carbon and silicon carbide substrate composite material (a C / C-SiC composite material).

Description

technical field [0001] The invention relates to a method for repairing the coating of a carbon ceramic brake disc, in particular to an online repair method for the coating of a carbon ceramic brake disc. Background technique [0002] The aviation brake pair is one of the key components for the aircraft to achieve braking and ensure flight safety. It uses the friction generated between relatively moving friction surfaces to achieve the purpose of braking. During the dozens of seconds when the aircraft lands and brakes, it needs to rely on the brake device to convert its huge kinetic energy into heat energy, and when braking, a sharp temperature rise occurs on the surface of the brake disc, which can make the surface temperature reach 600°C-800°C or more. [0003] Carbon-ceramic materials are currently widely used materials for brake discs. They have the characteristics of low density, wear resistance, oxidation resistance and thermal shock resistance. The remarkable feature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/85
Inventor 王一光成来飞张立同杨娟
Owner NORTHWESTERN POLYTECHNICAL UNIV
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