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Preparation method of AT13 plasma spraying feed with microstructure uniformity

An AT13, microstructure technology, applied in chemical instruments and methods, transportation and packaging, dissolution, etc., can solve the problem of not very significant improvement in comprehensive performance, prevent reverse aggregation and sedimentation, improve distribution uniformity, and inhibit reverse aggregation. Effect

Pending Publication Date: 2022-03-08
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the bonding strength of coatings fed with nano-scale AT13 can generally be increased to 10-20% of ordinary coatings, and the crack growth resistance can generally be increased by 10-13%, and the overall performance improvement is not very significant.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of AT13 plasma spraying feed material with high microstructure uniformity, the steps are as follows:

[0032] Firstly, select α-Al with a particle size of 30~50nm after being calcined at 600°C for 3 hours. 2 o 3 powder, using deionized water as solvent, according to α-Al 2 o 3The target solid phase content of the slurry is 65~75%, and deionized water is added. In this embodiment, according to α-Al 2 o 3 Add deionized water to the target solid phase content of the slurry at 65%, and the mass of the water accounts for α-Al 2 o 3 53.8% of the powder, add the organic dispersant CE64 accounting for 1.2% of the powder into the water solvent, and mix the additives in the water evenly by mechanical stirring. α-Al 2 o 3 After the powder and the aqueous solution containing the dispersant are mixed, depolymerize with a nano ball mill, wherein the frequency of the ball mill is set to 20Hz, the ball milling medium uses 0.5mm zirconia balls, and the ball ...

Embodiment 2

[0039] A preparation method of AT13 plasma spraying feed material with high microstructure uniformity, the steps are as follows:

[0040] Firstly, select α-Al with a particle size of 50~70nm after being calcined at 600°C for 4 hours. 2 o 3 Powder, using deionized water as a solvent, the mass of water accounted for α-Al 2 o 3 45.5% of the powder, add the organic dispersant CE64 accounting for 1.3% of the powder into the water solvent, and mix the additives in the water evenly by mechanical stirring. α-Al 2 o 3 The powder and the aqueous solution containing the dispersant are mixed and depolymerized with a nano ball mill, wherein the frequency of the ball mill is set to 20Hz, the ball milling medium uses 0.5mm zirconia balls, and the ball milling time is 5h, so that the α-Al after ball milling 2 o 3 The particle size of the powder is reduced to D50 below 0.1μm (the size of some aggregates before ball milling is greater than 100nm), D90 is below 0.3μm, and ball milling can ...

Embodiment 3

[0047] A preparation method of AT13 plasma spraying feed material with high microstructure uniformity, the steps are as follows:

[0048] Firstly, select α-Al with a particle size of 70~90nm after being calcined at 600°C for 5 hours. 2 o 3 Powder, using deionized water as a solvent, the mass of water accounted for α-Al 2 o 3 33.3% of the powder, add the organic dispersant CE64 accounting for 1.5% of the powder into the water solvent, and mix the additives in the water evenly by mechanical stirring. α-Al 2 o 3 The powder and the aqueous solution containing the dispersant are mixed and depolymerized with a nano ball mill, wherein the frequency of the ball mill is set to 20Hz, the ball milling medium uses 0.5mm zirconia balls, and the ball milling time is 5h, so that the α-Al after ball milling 2 o 3 The particle size of the powder is reduced to D50 below 0.1μm (the size of some aggregates before ball milling is greater than 100nm), D90 is below 0.3μm, and ball milling can ...

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Abstract

The invention discloses a preparation method of an AT13 plasma spraying feed with microstructure uniformity, alpha-Al2O3 powder and rutile type TiO2 powder are depolymerized separately and then mixed and ball-milled, component segregation possibly caused by uneven adsorption when a small amount of TiO2 powder and a large amount of alpha-Al2O3 powder are ball-milled and mixed together at the initial stage is prevented, then a homogenizer is used for dispersion, and the uniformity of the microstructure of the AT13 plasma spraying feed is improved. The uniform state of the slurry can be further maintained, and the distribution uniformity of TiO2 is improved, so that the AT13 spraying feed with high structure uniformity is prepared.

Description

technical field [0001] The invention belongs to the technical field of thermal spraying ceramic powder preparation, and in particular relates to a preparation method of AT13 plasma spraying feed material with uniform microstructure. Background technique [0002] The preparation of ceramic coatings on metal substrates can organically combine the characteristics of ceramic materials and metal materials to obtain products with various composite material structures. This has become the most active and effective field of contemporary thermal spraying technology, especially in the high-tech field. Ceramic materials have a high melting point, and powder flame spraying is limited by the flame temperature. When the melting point of the ceramic material is higher than 2300 ° C, it is not suitable to use powder flame spraying, so the preparation of ceramic coatings usually uses plasma spraying technology. [0003] Alumina ceramics are neutral oxides with high reflectivity to light an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/626B01F33/83
CPCC04B35/10C04B35/62605C04B35/6261C04B35/6264C04B35/62695C04B35/62645C04B35/62222C04B2235/5445C04B2235/5454C04B2235/3232
Inventor 杨硕武笑宇黄磊陈凤秋刘汉强苏摇李燕萍
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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