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Method for preparing ceramic coating by precursor conversion method

A precursor conversion and ceramic coating technology, which is applied in the field of ceramic coating preparation by organic polymer precursor conversion method, can solve the problems of long preparation period and uncontrollable coating thickness, achieve low cost, improve oxidation resistance, The effect of simple preparation process

Inactive Publication Date: 2011-08-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some shortcomings in the final ceramic coating, such as long preparation period and uncontrollable coating thickness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0019] (3) The sample after cross-linking curing treatment is cracked. The maximum pyrolysis temperature is 1400°C, and the pyrolysis time

Embodiment 3

[0023] (3) The sample after the cross-linking curing treatment is cracked. The maximum cracking temperature is 1350°C, and the cracking time

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Abstract

The invention relates to a method for preparing a ceramic coating by a precursor conversion method. In the invention, an ultraviolet-curable organic silicon polymer is used as a ceramic precursor, and a slurry is prepared by adding a certain amount of solid BaO·Al2O3·SiO2 powder Brush on the surface of the composite material, and obtain a dense and uniform ceramic coating after UV curing and high temperature treatment. The invention effectively solves the problem of cracking cracks in the ceramic coating prepared by the traditional precursor conversion method, and has the characteristics of short preparation period, simple process and good repeatability. It has been verified that the coating system prepared by the invention can effectively improve the oxidation resistance of the composite material.

Description

The method for preparing ceramic coating by precursor conversion method one, technical field The present invention relates to a kind of method that organic polymer precursor conversion method prepares ceramic coating, specifically a kind of precursor A method for preparing ceramic coatings by bulk conversion method. 2. Background technology Continuous carbon fiber toughened silicon carbide ceramic composite material (C / SiC) has high temperature resistance, low density, high specific strength, high ratio Excellent properties such as mold resistance, anti-oxidation and ablation resistance, with metal-like fracture behavior, insensitive to cracks, and no catastrophic damage It is generally regarded as one of the high-temperature structural materials for high-performance engines. A major problem in the application of C / SiC It has poor antioxidant properties. This is mainly due to the mismatch of the coefficient of thermal expansion (CTE) between the SiC matrix and the C ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/565
Inventor 王一光张立同成来飞李厚补
Owner NORTHWESTERN POLYTECHNICAL UNIV
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