Method for preparing coating with micro-nano composite structure through liquid plasma spraying

A micro-nano composite structure, plasma spray gun technology, applied in metal material coating process, coating, fusion spraying and other directions, can solve problems such as failure and coating performance degradation, and achieve good high temperature resistance and fine coating structure. , The effect of high deposition efficiency

Inactive Publication Date: 2014-12-10
扬州精雅电子有限公司
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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 micro-nano composite structure coating by plasma spraying of a liquid material. The present invention can solve or partially solve thermal barrier coatings, solid oxide fuel cell electrode coatings, and gas-sensing layers for medium and high temperature gas sensors. , High-temperature wear-resistant and lubricating coatings have problems of coating performance degradation and failure caused by grain growth

Method used

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  • Method for preparing coating with micro-nano composite structure through liquid plasma spraying
  • Method for preparing coating with micro-nano composite structure through liquid plasma spraying
  • Method for preparing coating with micro-nano composite structure through liquid plasma spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 50g tungsten chloride WCl 6 powder, dissolved in 250 ml of absolute ethanol to obtain a blue transparent solution. 25 g of tungsten oxide WO with an average particle size of 1 μm 3 Powder added to blue WCl 6 solution, and use magnetic stirring to mix evenly to obtain a suspension.

[0046] The prepared suspension liquid was fed into the flame flow generated by the F4MB plasma spray gun through a non-atomizing nozzle with a diameter of 0.5 mm, and 2 o 3 WO 3 Composite coating. The coating was analyzed by X-ray diffraction analysis (XRD) and field emission scanning electron microscope (FE-SEM). The results showed that the coating showed a monoclinic phase WO 3 , the microstructure is a nano-submicron composite structure.

[0047]

Embodiment 2

[0049]Weigh 50g crystalline zinc acetate Zn (CH3COO) 2 2H2O, dissolved in 500 ml deionized water to obtain a colorless transparent solution. Add 50 g of ZnO powder with an average particle size of 2.5 μm to the blue Zn(CH3C0O) 2 solution, and use magnetic stirring to mix evenly to obtain a suspension.

[0050] The prepared suspension liquid was fed into the flame flow generated by the F4MB plasma spray gun through a nozzle with a diameter of 0.75 mm, and a ZnO composite coating was obtained on the Fe substrate. The coating is analyzed by XRD and SEM, and the results show that the coating presents a hexagonal wurtzite structure, and the microstructure is a nano-micro composite structure.

[0051]

Embodiment 3

[0053] Weigh 50g tin dichloride (SnCl 2 ) powder, dissolved in 500 ml deionized water to obtain a colorless transparent solution. Add 50 g of tin oxide powder with an average particle size of 0.5 μm into the tin dichloride solution, and use magnetic stirring to mix evenly to obtain a suspension.

[0054] The prepared suspension liquid was fed into the flame flow generated by the F4MB plasma spray gun through a non-atomizing nozzle with a diameter of 0.25 mm, and 2 o 3 SnO 2 Composite coating. The coating was analyzed by X-ray diffraction analysis XRD and field emission scanning electron microscope FE-SEM analysis, the results showed that SnO 2 The coating presents a rutile structure, and the microstructure is a nano-submicron composite structure.

[0055]

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Abstract

The invention discloses a method for preparing a coating with a micro-nano composite structure through liquid plasma spraying. The method comprises the following steps of (1) adding solution salt and suspension liquid granules into a solvent to obtain a suspension liquid; and (2) delivering the suspension liquid to a flame flow generated by a plasma spraying gun through a non-atomizing nozzle, and praying the flame flow generated by the plasma spraying gun to a pretreated spraying matrix, thereby obtaining the costing with the composite structure on the spraying matrix. By using the method, the problems of coating performance reduction and invalidation caused by grain growth in a thermal barrier coating, a solid oxide fuel battery electrode coating, an air-sensitive coating of a medium-high temperature gas sensor and a high-temperature wear-resistant lubricating coating can be solved or partially solved.

Description

technical field [0001] The invention relates to a method for preparing a micro-nano composite structure coating by liquid material plasma spraying, and belongs to the technical field of engineering and material science. Background technique [0002] The Chinese invention patent with the publication number CN101177769B discloses a direct and rapid manufacturing method of plasma spraying of porous materials, by pretreating (preheating) the sprayed substrate, and then using the spray gun to scan on the substrate according to the set scanning trajectory, Set the scanning line interval, spray gun scanning speed, delivery amount, angle between spray gun and substrate surface and other parameters to obtain a coating with a gradient structure. This patent uses the traditional plasma spraying process and conventional plasma spraying powder, and the structure of the coating is not as fine as this patent, so it is not suitable for functional coatings. [0003] The invention patent wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/10C23C26/00
Inventor 张超耿欣李大玉
Owner 扬州精雅电子有限公司
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