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Preparation method of high-temperature anti-oxidation coating for carbon-ceramic brake disc

A brake disc and anti-oxidation technology is applied in the field of preparation of high-temperature anti-oxidation coatings for carbon-ceramic brake discs, which can solve the problems of complex preparation process, high cost, weak anti-oxidation ability and the like, and achieves simple preparation process, low cost, The effect of strong resistance to seawater erosion

Inactive Publication Date: 2014-04-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing a high-temperature anti-oxidation coating for carbon ceramic brake discs, which overcomes the high cost of preparation materials, complicated preparation process and anti-oxidation coating under seawater conditions in the existing coating technology. It is a preparation method with simple and easy-to-obtain raw materials, simple preparation process, low requirements on the preparation environment, and effective anti-oxidation protection for materials at high temperatures.

Method used

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  • Preparation method of high-temperature anti-oxidation coating for carbon-ceramic brake disc
  • Preparation method of high-temperature anti-oxidation coating for carbon-ceramic brake disc
  • Preparation method of high-temperature anti-oxidation coating for carbon-ceramic brake disc

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Embodiment 1

[0027] Preparation of magnesium aluminum silica sol:

[0028] Dissolve magnesium nitrate and citric acid with a molar ratio of 1:2 in water, and the mass ratio of citric acid to water is 0.5:1 to prepare a magnesium nitrate solution; dissolve aluminum nitrate and citric acid with a molar ratio of 1:3 in water , the mass ratio of citric acid to water is 0.7:1 to prepare aluminum nitrate solution; then add absolute ethanol and water to hydrolyze appropriate amount of ethyl orthosilicate to prepare silica sol, wherein ethyl orthosilicate, absolute ethanol The molar ratio with water is 1:4:1. Under the condition of constant stirring, magnesium nitrate solution and aluminum nitrate solution were added to the silica sol in turn, hydrochloric acid or ammonia water was added dropwise to adjust the pH to 1, and the magnesium aluminum silica sol was prepared, which was sealed for use.

[0029] Preparation of phosphate solution:

[0030] Put aluminum phosphate, manganese phosphate, zin...

Embodiment 2

[0039] Preparation of magnesium aluminum silica sol:

[0040] Magnesium nitrate and citric acid with a molar ratio of 1:2.5 were dissolved in water, and the mass ratio of citric acid to water was 0.6:1 to prepare a magnesium nitrate solution; aluminum nitrate and citric acid with a molar ratio of 1:4 were dissolved in In water, the mass ratio of citric acid to water is 0.8:1, and it is prepared into an aluminum nitrate solution; then an appropriate amount of ethyl orthosilicate is added to absolute ethanol and water for hydrolysis to prepare a silica sol, wherein ethyl orthosilicate, no The molar ratio of water ethanol to water is 1:3:1.5. Under the condition of constant stirring, magnesium nitrate solution and aluminum nitrate solution were added to the silica sol in turn, hydrochloric acid or ammonia water was added dropwise to adjust the pH to 3, and the magnesium aluminum silica sol was prepared, which was sealed for use.

[0041] Preparation of phosphate solution:

[00...

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Abstract

The invention relates to a preparation method of a high-temperature anti-oxidation coating for a carbon-ceramic brake disc. The method mainly comprises the following steps: with magnesium nitrate, aluminum nitrate, ethyl orthosilicate and the like as raw materials, preparing sol as an inner coating material; with phosphate as a raw material, preparing a solution as an outer coating material; and uniformly coating the sol and the solution on the surface of the carbon-ceramic brake disc material, so as to obtain the coating which is good in binding force with a matrix and compact by high-temperature treatment. By adopting the method, the problem of oxidation of the carbon-ceramic brake disc coating at high temperature is effectively solved, and the coating has good water resistance and seawater resistance. Meanwhile, the method has the advantages of simple preparation technology, short preparation period, good repeatability and the like.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature anti-oxidation coating for a carbon-ceramic brake disc, in particular to a method for manufacturing an anti-oxidation coating for a carbon-ceramic aircraft brake material with simple preparation process, low cost and excellent performance. Background technique [0002] Carbon ceramic brake material has the advantages of low density, high temperature resistance, high strength, stable friction performance, especially high static friction coefficient, small attenuation and fast recovery of friction performance in wet and seawater environments, which can greatly improve the braking efficiency and the durability of the brake material. service life. Therefore, carbon ceramic brake material is a very competitive new generation of aircraft brake material. In the case of normal landing and overload landing of the aircraft, the volume temperature rise of the brake pair can reach 600-800°C, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85
Inventor 范尚武张立同杨鸿梅成来飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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