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Plasma sprayed ceramic powder, ceramic composite coating and preparation method of ceramic composite coating

A technology of ceramic powder and ceramic composite, which is applied in the direction of coating, metal material coating process, molten spraying, etc., can solve the problems of coating index gap, difficulty in mass production, low density, etc., and achieve high density and improved Bonding method, effect of low porosity

Inactive Publication Date: 2019-01-18
常州瑞赛激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional thermal spraying technology and ceramic powder generally have relatively high porosity and low density during the application process. It is also possible to apply it to conventional ceramic anilox rolls, but it limits the application in precise coating of lithium battery diaphragm alumina. application
By adjusting the process parameters and using a sealing agent, the density and porosity will be improved, but there are certain difficulties in mass production. Therefore, through the optimization of the powder formula, the ceramic composite coating with low porosity and high density is suitable for alumina diaphragms. The engineering application of precision coating is of great significance
[0003] In most cases, the atmospheric plasma spraying powder is increased by adding an appropriate amount of metal-based powder, such as aluminum, magnesium and other materials with a lower melting point, but these are more than enough for general applications. There is still a large gap in the coating index

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The present embodiment provides a kind of preparation method of ceramic composite coating, comprising:

[0041] Deploying plasma spraying ceramic powder, including: CeO by mass percentage 2 : 0.6%, TiO 2 : 0.30%, Fe 2 o 3 : 0.1%, Al 2 o 3 : 0.3%, Na 2 O: 0.4%, and the balance is chromium oxide. Its particle size distribution is 15 μm, and its fluidity is 55 s / 100 g.

[0042] Machining the base roller of the shaft to be processed; use sandblasting to roughen the surface and remove rust and surface grease;

[0043]Atmospheric plasma spraying system is used to spray the surface of the parts to be processed, and the following process parameters are adopted: air pressure 0.4MPa, spraying current 280A, spraying distance 170mm, powder feeding rate 5kg / h, lap rate 30%, single layer cladding thickness 10μm .

[0044] The ceramic composite coating prepared in this embodiment has a porosity of 1.1% and a density of 0.92.

Embodiment 2

[0046] The present embodiment provides a kind of preparation method of ceramic composite coating, comprising:

[0047] Deploying plasma spraying ceramic powder, including: CeO by mass percentage 2 : 0.7%, TiO 2 : 0.20%, Fe 2 o 3 : 0.12%, Al 2 o 3 : 0.35%, Na 2 O: 0.45%, and the balance is chromium oxide. Its particle size distribution is 35 μm, and its fluidity is 60 s / 100 g.

[0048] Machining the base roller of the shaft to be processed; use sandblasting to roughen the surface and remove rust and surface grease;

[0049] Atmospheric plasma spraying system is used to spray the surface of the parts to be processed, and the following process parameters are adopted: air pressure 0.3MPa, spraying current 250A, spraying distance 150mm, powder feeding rate 6kg / h, lap rate 32%, single layer cladding thickness 11μm .

[0050] The ceramic composite coating prepared in this embodiment has a porosity of 1.05% and a density of 0.93.

Embodiment 3

[0052] The present embodiment provides a kind of preparation method of ceramic composite coating, comprising:

[0053] Deploying plasma spraying ceramic powder, including: CeO by mass percentage 2 : 0.8%, TiO 2 : 0.10%, Fe 2 o 3 : 0.14%, Al 2 o 3 : 0.45%, Na 2 O: 0.50%, and the balance is chromium oxide. Its particle size distribution is 20 μm, and its fluidity is 65 s / 100 g.

[0054] Machining the base roller of the shaft to be processed; use sandblasting to roughen the surface and remove rust and surface grease;

[0055] Atmospheric plasma spraying system is used to spray the surface of the parts to be processed, and the following process parameters are adopted: air pressure 0.5MPa, spraying current 260A, spraying distance 160mm, powder feeding rate 7kg / h, lap rate 34%, single layer cladding thickness 12μm .

[0056] The porosity of the ceramic composite coating prepared in this embodiment is 1.08%, and the density is 0.94.

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Abstract

The invention discloses plasma sprayed ceramic powder, a ceramic composite coating and a preparation method of the ceramic composite coating, and belongs to the technical field of thermal spraying ceramic powder. The plasma sprayed ceramic powder is prepared from the following components in percentage by mass: 0.3-1.5 percent of CeO2, 0.01 to 0.55 percent of TiO2, 0.05 to 0.4 percent of Fe2O3, 0.1to 0.5 percent of Al2O3, 0.2 to 0.8 percent of Na2O and the balance of chromium oxide. The coating prepared by spraying has the advantages of low porosity and high density.

Description

technical field [0001] The invention belongs to the technical field of thermal spraying ceramic powder, and in particular relates to a plasma spraying ceramic powder, a ceramic composite coating and a preparation method thereof. Background technique [0002] Ceramic micro-gravure rollers used for precision coating have high requirements on surface coating quality, especially ceramic micro-grooved rollers used for lithium battery diaphragm ceramic slurry coating, not only require high wear resistance, but also require surface roughness, porosity The rate is low to ensure the uniformity and consistency of the coating layer. Therefore, the porosity and density of the ceramic composite coating are important indicators to determine the quality of the micro-gravure roll. However, conventional thermal spraying technology and ceramic powder generally have relatively high porosity and low density during the application process. It is also possible to apply it to conventional ceramic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/11C23C4/134
CPCC23C4/11C23C4/134
Inventor 葛建国戴超冯志超
Owner 常州瑞赛激光技术有限公司