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Preparation method of metal ceramic coating

A metal-ceramic coating and ceramic substrate technology, applied in the field of preparation of metal-ceramic coatings, can solve the problems of poor bonding tightness, poor thermal shock resistance and high temperature oxidation resistance, and achieve uniformity, prolong life, Improved wear resistance and corrosion resistance

Inactive Publication Date: 2020-04-10
界首市伟盛古窑彩陶制作发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a cermet coating. By pretreating the ceramic substrate and sintering the ceramics sprayed with the intermediate coating and the surface coating by vacuum sintering, the coating is improved. Uniformity, reduce the defects of voids and cracks on the ceramic surface, improve the thermal shock resistance and high temperature oxidation resistance of the ceramic surface coating, and solve the problems of poor bonding, thermal shock resistance and high temperature in the existing ceramic coatings The problem of poor antioxidant performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a cermet coating, comprising the steps of:

[0023] S1. Substrate pretreatment: Grinding the surface of the substrate to obtain a ceramic substrate with smooth surface and uniform roughness;

[0024] S2, the polished ceramic substrate was repeatedly washed in clear water for 10 minutes, then ultrasonically cleaned with acetone to degrease and cleaned for 5 minutes, washed with distilled water for 20 minutes, and then dried in the air;

[0025] S3. Prepare the middle layer slurry: mix the titanium metal powder and the adhesive according to the mass ratio of 1:2, stir evenly, stir at a speed of 100r / min for 3min, and obtain a uniform middle layer slurry. Pretreatment to improve the adsorption of the intermediate layer slurry to ceramics and ensure the uniformity of the intermediate layer coating.

[0026] S4, the surface of the ceramic substrate after drying is sprayed with a 15um thickness of the intermediate layer coating, the surface of the cera...

Embodiment 2

[0032] A method for preparing a cermet coating, comprising the steps of:

[0033] S1. Substrate pretreatment: Grinding the surface of the substrate to obtain a ceramic substrate with smooth surface and uniform roughness;

[0034] S2, the polished ceramic substrate was repeatedly washed in clear water for 20 minutes, then ultrasonically cleaned with acetone to degrease and cleaned for 15 minutes, washed with distilled water for 40 minutes, and then dried in the air;

[0035] S3. Prepare the middle layer slurry: mix the titanium metal powder and the adhesive according to the mass ratio of 2:5, stir evenly, stir at a speed of 350r / min for 5min, and obtain a uniform middle layer slurry. Pretreatment to improve the adsorption of the intermediate layer slurry to ceramics and ensure the uniformity of the intermediate layer coating;

[0036] S4, the surface of the ceramic substrate after drying is sprayed with a 35um thickness of the intermediate layer coating, the surface of the cer...

Embodiment 3

[0042] A method for preparing a cermet coating, comprising the steps of:

[0043] S1. Substrate pretreatment: Grinding the surface of the substrate to obtain a ceramic substrate with smooth surface and uniform roughness;

[0044] S2, the polished ceramic substrate was repeatedly washed in clear water for 30 minutes, then ultrasonically cleaned with acetone to degrease and cleaned for 25 minutes, washed with distilled water for 60 minutes and then dried in the air;

[0045] S3. Prepare the middle layer slurry: mix the titanium metal powder and the adhesive according to the mass ratio of 3:8, stir evenly, stir at a speed of 600r / min for 8min, and obtain a uniform middle layer slurry. Pretreatment to improve the adsorption of the intermediate layer slurry to ceramics and ensure the uniformity of the intermediate layer coating;

[0046] S4, the surface of the ceramic substrate after drying is sprayed with a 60um thickness intermediate layer coating, and the surface of the ceramic s...

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Abstract

The invention discloses a preparation method of a metal ceramic coating. The method comprises the following steps: polishing the surface of a matrix, cleaning the ceramic matrix, removing oil, airing,and preparing a middle layer slurry; spraying the surface of the ceramic matrix wit the middle layer coating material, and sintering the ceramic matrix surface coated with a transition layer in a central control furnace to obtain a uniform and compact transition layer; preparing a surface layer coating; coating the surface of the ceramic with the surface layer slurry, and sintering the ceramic matrix surface coated with the transition layer in a vacuum furnace to obtain a uniform and compact metal ceramic outer layer. According to the invention, the ceramic matrix is pretreated to improve theadsorption effect of the middle layer slurry on the ceramic and ensure the coating uniformity of the middle layer coating material, and the ceramic sprayed with the middle layer coating material andthe surface layer coating material is sintered by adopting a vacuum sintering method so as to improve the uniformity of the coating, reduce the defects of cavities and cracks on the surface of the ceramic and improve the thermal shock resistance and the high-temperature oxidation resistance of the coating on the surface of the ceramic.

Description

technical field [0001] The invention belongs to a method for preparing ceramics, and relates to a method for preparing a cermet coating. Background technique [0002] At present, railway transportation is an important mode of transportation. The high-speed railway catenary is the overhead equipment most directly related to the operation of high-speed electrified railways. Its working environment is harsh, and it is erected along the line without backup. It is the weakest link in the entire traction power supply system. The quality and working state of the catenary will directly affect the transportation capacity of the electrified railway, and the catenary is required to have sufficient stability and elasticity in the mechanical structure, as well as sufficient corrosion resistance and wear resistance to extend the service life of the equipment as much as possible . [0003] Cermet is a very important composite material. It not only maintains the characteristics of high st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/90B24B1/00
CPCB24B1/00C04B41/0072C04B41/52C04B41/90C04B41/5133C04B41/50
Inventor 孙文文孙翌博邢淑芹
Owner 界首市伟盛古窑彩陶制作发展有限公司
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