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Preparation method of plasma spraying Al2O3-TiO2 composite powder

A technology of al2o3-tio2 and composite powder, which is applied in the direction of coating, fusion spraying, metal material coating process, etc., can solve the problems of poor performance, unsmooth feeding, uneven coating components, etc., and achieve service life Long, evenly textured, easy-to-step results

Pending Publication Date: 2021-12-21
南京金鲤新材料有限公司
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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the deficiencies of the prior art and provide a plasma sprayed Al 2 o 3 -TiO 2 Composite powder preparation method, through co-precipitation method, prepared aluminum oxide-titania composite powder uniformly mixed on the atomic scale, and then prepared spherical composite powder that can be sprayed by spray granulation method, the composite powder solves the problem of coating Inhomogeneous layer composition, poor performance, and unsmooth feeding during spraying

Method used

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with specific implementation examples.

[0018] A kind of plasma spraying Al of the present invention 2 o 3 -TiO 2 Composite powder preparation method, comprises the steps:

[0019] (1) soluble titanium salt and soluble aluminum salt are configured into a mixed solution in proportion;

[0020] (2) While stirring the mixed solution of step (1), drip ammoniacal liquor until the pH of the solution is greater than 7, stop dripping ammoniacal liquor, and then stir for 12h;

[0021] (3) rinsing, drying and calcining the mixed slurry of step (2) to obtain a composite powder;

[0022] (4) ball milling, sand milling, and granulating the composite powder of step (3) to obtain granulated powder of the composite powder;

[0023] (5) Calcining the granulated powder in step (4) at 1000 degrees Celsius for 2 hours to obtain a composite powder for spraying.

[0024] Further, the soluble titanium salt i...

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Abstract

The invention relates to a preparation method of plasma spraying Al2O3-TiO2 composite powder. The preparation method comprises the following steps: preparing aluminum oxide-titanium oxide composite powder which is uniformly mixed on an atomic scale through a coprecipitation method, and then preparing sprayable spherical composite powder through a spray granulation method, so that the composite powder solves the problems of non-uniform coating components, poor performance, and unsmooth feeding during spraying. The spherical spraying powder of a core-shell structure enables the components and the structure of a coating to be more uniform, the bonding performance of the coating is better, and the service life of the coating is longer.

Description

technical field [0001] The invention relates to the field of preparation of intermetallic compound materials, specifically a plasma sprayed Al 2 o 3 -TiO 2 Composite powder preparation method. Background technique [0002] al 2 o 3 The coating has high hardness, good wear resistance, and stable chemical properties. It is often used for anti-rust and anti-scratch treatment on the surface of important metal parts. However, the thermal shock resistance of alumina coating is poor, the toughness is low, and the surface of the coating has many pores. , the processing gloss is low, and the coating is prone to cracking, falling off and short service life during use. In order to improve the above shortcomings of alumina coating, some researchers proposed to mix part of titanium oxide with alumina to make alumina-titania composite coating. The melting point of titanium oxide is lower than that of alumina, and the toughness is good. The coating has relatively Low porosity and bet...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/11
CPCC23C4/134C23C4/11
Inventor 钟小亮王洋
Owner 南京金鲤新材料有限公司
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