A kind of preparation method of thermal spraying porous ceramic coating

A technology of porous ceramics and thermal spraying, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problem of inability to produce ceramic porous materials with a thickness less than 1mm, narrow spatial distribution of porous ceramics, and inability to produce hard porous materials and other issues, to achieve the effect of reducing the friction coefficient, controllable mechanical properties, and reducing heat transmission

Active Publication Date: 2020-08-25
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional preparation methods of porous materials can be divided into: 1. Extrusion molding method, which can only produce porous materials with a thickness of more than 1mm, and cannot produce ceramic porous materials with a thickness of less than 1mm, and cannot form materials with complex channels. Higher, unable to produce porous materials with higher hardness
2. Particle accumulation pore forming process, this method has higher cost and lower porosity
3. The process method of adding pore-forming agent, which has poor uniformity of pore distribution and is not suitable for producing products with high porosity
4. Sol-gel process method, the spatial distribution range of porous ceramics prepared by this method is extremely narrow

Method used

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  • A kind of preparation method of thermal spraying porous ceramic coating
  • A kind of preparation method of thermal spraying porous ceramic coating

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A preparation method for thermal spraying porous ceramic coating, specifically comprising the following steps:

[0022] (1) The surface of the substrate is roughened by sandblasting, and then the sandblasting surface is cleaned with dry air. The sand material used in the rough sandblasting process is zirconium corundum with a particle size of 15-30 μm.

[0023] (2) Weigh 60g of YSZ powder, 20g of NiCoCrAl powder, 10g of Mg, and 10g of copper clad Mg powder; crush the materials by mechanical ball milling, and pass through a 325-mesh mechanical vibrating sieve.

[0024] (3) Fully mix 60g of YSZ (yttrium stabilized zirconia) powder and 10g of copper-coated Li powder prepared in step (2).

[0025] (4) Feed the NiCoCrAl powder obtained in (2) into a powder feeder and use supersonic flame spraying to spray the bonding layer on the surface of the substrate obtained in (1).

[0026] (5) Set the parameters of the plasma spraying equipment, put 10g of Mg powder obtained in step ...

Embodiment 2

[0029] A preparation method for thermal spraying porous ceramic coating, specifically comprising the following steps:

[0030] (1) The surface of the substrate is roughened by sandblasting, and then the sandblasting surface is cleaned with dry air. The sand material used in the rough sandblasting process is zirconium corundum with a particle size of 15-30 μm.

[0031] (2) Weigh 50g of AT40 powder, 30g of NiCrAl powder, 12g of Cu powder, and 8g of copper-clad Sn powder. The material is crushed by mechanical ball milling method, and passed through a 325-mesh mechanical vibrating screen.

[0032] (3) Fully mix 50g of AT40 powder prepared in step (2) with 8g of copper-clad Sn powder.

[0033] (4) Feed the NiCrAl powder obtained in (2) into a powder feeder and use supersonic flame spraying to spray the bonding layer on the surface of the substrate obtained in (1).

[0034] (5) Set the parameters of the plasma spraying equipment, put 12g of Cu powder obtained in step (2) into a po...

Embodiment 3

[0037] A preparation method for thermal spraying porous ceramic coating, specifically comprising the following steps:

[0038] (1) The surface of the substrate is roughened by sandblasting, and then the sandblasting surface is cleaned with dry air. The sand material used in the rough sandblasting process is zirconium corundum with a particle size of 15-30 μm.

[0039] (2) Weigh 50g of SiC powder, 25g of CoCrAl powder, 20g of Al powder, and 5g of copper-clad Pb powder. The material is crushed by mechanical ball milling method, and passed through a 325-mesh mechanical vibrating screen.

[0040] (3) Fully mix 50g of SiC powder prepared in step (2) with 5g of copper-coated Pb powder.

[0041] (4) Send the CoCrAl powder obtained in (2) into a powder feeder and use supersonic flame spraying to spray the bonding layer on the surface of the substrate obtained in (1).

[0042] (5) Set the parameters of the plasma spraying equipment, put 20g of Al powder obtained in step (2) into a po...

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Abstract

The invention discloses a preparation method of a thermal-sprayed porous ceramic coating and belongs to the field of thermal-sprayed ceramic composites. Firstly, a bonding layer is prepared through supersonic flame spraying, mixed powder of a high-temperature stabilizer and a diaphoretic and a cooling agent are sent to two powder feeders respectively, a ceramic coating is obtained through thermalspraying on a matrix surface with the bonding layer sprayed, and the thermal-sprayed porous ceramic coating is obtained through thermal treatment of the ceramic coating. In the method, the high-melting-point ceramic material forms a framework of the coating, the coating bears load and impact in the service process, and the low-melting-point cooling agent and diaphoretic are uniformly distributed in the framework of the ceramic material and precipitate in the gas form during thermal treatment to form holes. The prepared porous ceramic coating has controllable pore size, controllable mechanicalperformance and controllable surface state, and the porous ceramic coatings with different thicknesses can be obtained as required.

Description

technical field [0001] The invention relates to a method for preparing a thermal spraying porous ceramic coating, which belongs to the field of thermal spraying ceramic coating materials. Background technique [0002] Porous ceramic materials have excellent properties such as low density, high specific surface area, low thermal conductivity, and corrosion resistance. They are widely used in metallurgy, chemical industry, and biology. They are used for gas and liquid filtration, purification, separation, chemical catalyst carrier, Sound absorption and shock absorption, thermal insulation materials, biological implant materials, special wall materials and sensor materials are widely used. [0003] The traditional preparation methods of porous materials can be divided into: 1. Extrusion molding method. This method can only produce porous materials with a thickness of more than 1mm, and cannot produce ceramic porous materials with a thickness of less than 1mm, and cannot form ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/073C23C4/06C23C4/129C23C4/134C23C4/18
CPCC23C4/06C23C4/073C23C4/129C23C4/134C23C4/18
Inventor 宋鹏李乔磊黄太红陆建生
Owner KUNMING UNIV OF SCI & TECH
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