Preparation method of multi-ceramic composite coating

A ceramic composite and coating technology, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problems of poor high temperature oxidation resistance, poor coating performance, unsuitable for application, etc., and achieve high density, The effect of low cost and close combination of phases

Active Publication Date: 2020-06-05
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention overcomes the defects of complex process, high cost, heavy pollution, low deposition efficiency, poor coating performance and unsuitable application in large-scale industrial production in the prior art for preparing multi-element ceramic composite coatings
At the same time, the present invention also overcomes the disadvantages of poor high-temperature oxidation resistance due to the absence of silicide and silicon carbide in the obtained coating caused by using boron carbide as raw material in the process of preparing boride and carbide ceramic composite coatings in the prior art

Method used

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  • Preparation method of multi-ceramic composite coating
  • Preparation method of multi-ceramic composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The first step is to prepare zirconia / silicon carbide / aluminum composite powder for thermal spraying:

[0049] The zirconia powder with a particle size range of 0.001 microns to 10 microns, silicon carbide powder with a particle size range of 0.001 microns to 10 microns, and aluminum powders with a particle size range of 0.1 microns to 10 microns are uniformly mixed into composite powder. Among them, the silicon carbide powder accounts for 5% of the total mass of the above-mentioned zirconia powder, silicon carbide powder and aluminum powder, and the aluminum powder plus zirconia powder accounts for the above-mentioned zirconia powder, silicon carbide powder and aluminum powder. The mass percentage of the total mass of the three raw material powders is 95%, the mass ratio between the zirconia powder and the aluminum powder is 60:40, and then the binder (methyl cellulose, the same as in Example 2-10) is uniformly mixed, The amount of the binder is such that the weight ra...

Embodiment 2

[0055] The first step is to prepare zirconia / silicon carbide / aluminum composite powder for thermal spraying:

[0056] The zirconia powder with a particle size range of 0.001 microns to 10 microns, silicon carbide powder with a particle size range of 0.001 microns to 10 microns, and aluminum powders with a particle size range of 0.1 microns to 10 microns are uniformly mixed into composite powder. Among them, the silicon carbide powder accounts for 10% of the total mass of the above-mentioned zirconia powder, silicon carbide powder and aluminum powder, and the aluminum powder plus zirconia powder accounts for the above-mentioned zirconia powder, silicon carbide powder and aluminum powder. The mass percentage of the total mass of the three raw material powders is 90%, the mass ratio between the zirconia powder and the aluminum powder is 85:15, and then evenly mixed into the binder, the amount of the binder is 100%, and the weight ratio is the above composite powder. : Binder=100:...

Embodiment 3

[0062] The first step is to prepare zirconia / silicon carbide / aluminum composite powder for thermal spraying:

[0063] The zirconia powder with a particle size range of 0.001 microns to 10 microns, silicon carbide powder with a particle size range of 0.001 microns to 10 microns, and aluminum powders with a particle size range of 0.1 microns to 10 microns are uniformly mixed into composite powder. Among them, silicon carbide powder accounts for 30% of the total mass of the above-mentioned zirconia powder, silicon carbide powder and aluminum powder, and aluminum powder plus zirconia powder accounts for the above-mentioned zirconia powder, silicon carbide powder and aluminum powder. The mass percentage of the total mass of the three raw material powders is 70%, and the mass ratio between the zirconia powder and the aluminum powder is 90:10, and then evenly mixed into the binder, the amount of the binder is 70%, and the weight ratio is the above composite powder. : Binder = 100:2, ...

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Abstract

The invention discloses a preparation method of a multi-ceramic composite coating. The method comprises the following steps of 1, preparing oxide/silicon carbide/aluminum composite powder for thermalspraying, wherein oxides include one to four of a zirconium oxide, a titanium oxide, a hafnium oxide, a tantalum oxide, a niobium oxide, a vanadium oxide, a chromic oxide, a molybdenum oxide and a tungsten oxide; 2, performing pretreatment on the surface of a substrate material needing to be coated; 3, adopting a thermal spraying method for coating the surface of the substrate material with the oxide/silicon carbide/aluminum composite powder. Accordingly, the multi-ceramic composite coating is obtained through in-situ synthesis. The defects that in the prior art, the technology for preparing the multi-ceramic composite coating is complete, high in cost, large in contamination, low in deposition efficiency, poor in coating performance and not suitable for application in large-scale industrial production are overcome.

Description

technical field [0001] The technical scheme of the present invention relates to the coating of carbides, silicides and oxides on materials, in particular to a preparation method of a multi-component ceramic composite coating. Background technique [0002] Carbide has high melting point (up to 3880°C), high hardness, and has good thermal conductivity, electrical conductivity, wear resistance and corrosion resistance and other comprehensive properties. It has important applications in the fields of machinery, metallurgy, aerospace, nuclear and military. value. Among them, titanium carbide is a typical transition metal carbide, and titanium carbide is the most widely developed material among titanium, zirconium, and chromium transition metal carbides. It is used in many fields such as machinery, electronics, chemical industry, environmental protection, fusion reactors, and defense industry. Widely used, especially for protective coatings of structural materials. As a refracto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/02C23C4/10C23C4/134
CPCC23C4/02C23C4/10C23C4/134
Inventor 杨勇王彦伟王晓龙崔宇航马玉夺孙文韦
Owner HEBEI UNIV OF TECH
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