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Method for preparing oxidation-resistant composite coating for carbon ceramic brake disc

A technology for composite coatings and brake discs, applied in the field of preparation of anti-oxidation composite coatings, can solve the problems of high cost of preparation materials, weak anti-oxidation ability, complicated preparation process, etc., and achieve simple preparation process and strong resistance to seawater erosion , The effect of simple preparation process

Inactive Publication Date: 2014-05-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing an anti-oxidation composite coating for carbon-ceramic brake discs, which overcomes the high cost of preparation materials, complicated preparation process and resistance to corrosion in the existing coating technology. It is a preparation method with easy-to-obtain raw materials, simple process, low requirements on the preparation environment, and effective anti-oxidation protection for materials at high temperatures.

Method used

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  • Method for preparing oxidation-resistant composite coating for carbon ceramic brake disc
  • Method for preparing oxidation-resistant composite coating for carbon ceramic brake disc
  • Method for preparing oxidation-resistant composite coating for carbon ceramic brake disc

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Preparation of glass powder slurry: make an organic silane binder with anhydrous alcohol and organosilane in a mass ratio of 50:15; combine organosilane binder, cordierite powder and glass powder in a mass ratio of 3:1 : 1 ratio mixing, ball milling to get a uniform glass powder slurry.

[0034] The organosilane is polyazinosilane, polysiloxane or polycarbosilane.

[0035] The cordierite powder is 2MgO·2Al with a softening point of 1200-1400°C 2 o 3 ·5SiO2 2 pink.

[0036] The glass powder is borosilicate glass powder with a softening point of 500-700°C.

[0037] Preparation of phosphate solution: Dissolve aluminum phosphate, manganese phosphate, boric acid and phosphoric acid in water with a molar ratio of 2:1:1:20, and the mass ratio of water to phosphoric acid is 30:25 to obtain a phosphate solution, which is sealed for use .

[0038] Step 1: Preparation of carbon ceramic brake disc samples:

[0039] The processed carbon-ceramic brake disc samples were ultraso...

Embodiment 2

[0046]Preparation of glass powder slurry: polyvinyl alcohol was dissolved in distilled water to prepare a polyvinyl alcohol aqueous solution with a concentration of 5%; the polyvinyl alcohol aqueous solution, cordierite powder and glass powder were mixed in a mass ratio of 9:2:1, and the A uniform glass powder slurry was obtained by ball milling.

[0047] The polyvinyl alcohol is substituted with sodium carboxymethylcellulose.

[0048] The cordierite powder is 2MgO·2Al with a softening point of 1200-1400°C 2 o 3 ·5SiO2 2 pink.

[0049] The glass powder is borosilicate glass powder with a softening point of 500-700°C.

[0050] Preparation of phosphate solution: Dissolve aluminum phosphate, manganese phosphate, boric acid and phosphoric acid in water with a molar ratio of 3:2:2:30, and the mass ratio of water to phosphoric acid is 35:25 to obtain a phosphate solution, which is sealed for use .

[0051] Step 1: Preparation of carbon ceramic brake disc samples

[0052] The ...

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Abstract

The invention relates to a method for preparing an oxidation-resistant composite coating for a carbon ceramic brake disc. The method comprises the following steps: preparing glass slurry to serve as a high-temperature self-healing coating by taking cordierite powder, glass powder and an organic adhesive as raw materials, preparing a solution to serve as a passivating coating by taking phosphate as a raw material, uniformly coating the glass slurry and the solution on the surface of a carbon ceramic brake material, and performing high-temperature heat treatment to obtain a dense coating which can be well combined with a matrix. The method has the beneficial effects that (1) the coating is uniform and dense and is well combined with the matrix; (2) the coating is excellent in oxidation resistance and thermal shock resistance; (3) the coating is high in marine corrosion resistance; and (4) the preparation process of the coating is simple in process, short in period, low in cost, convenient, feasible and suitable for industrial preparation.

Description

technical field [0001] The invention relates to a method for preparing an anti-oxidation composite coating for carbon ceramic brake discs, in particular to a method for manufacturing an anti-oxidation coating for carbon ceramic aircraft brake materials. 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 tens of seconds of landing and braking, the aircraft needs to rely on the brake device to convert its huge kinetic energy into heat energy to dissipate. When braking, a sharp temperature rise occurs on the surface of the brake disc, which can make the surface temperature reach 600 ℃ ~ 800 ℃. [0003] Carbon-ceramic brake material has the advantages of high and stable friction coefficient, small attenuation of wet friction coefficient, and strong wear resistance. It...

Claims

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Application Information

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IPC IPC(8): C04B41/89
CPCF16D69/027F16D69/023F16D2250/0046
Inventor 范尚武张立同杨鸿梅成来飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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