Self-healing coating for improving interlayer bonding energy and preparation method thereof

A self-healing and binding energy technology, used in coatings, metal material coating processes, melt spraying, etc., can solve the problems of high porosity, unevenness, high energy consumption, and improve binding energy and surface morphology. , the effect of low porosity
CN114686790APending Publication Date: 2022-07-01CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2022-07-01

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Abstract

The invention discloses a self-healing coating capable of improving interlayer bonding energy and a preparation method of the self-healing coating, and belongs to the technical field of metal material protection. The coating is sprayed on a base body in a plasma spraying mode, and the coating sequentially comprises a NiCrAlY bonding layer with the thickness of 50 micrometers, a NiCrAlY + TiC self-healing middle layer with the thickness of 40-60 micrometers and an AT13 ceramic environment barrier layer with the thickness of 100-120 micrometers from inside to outside. Wherein the mass ratio of NiCrAlY to TiC in the self-healing middle layer is 1: 5; the preparation method comprises the following steps: after the self-healing intermediate layer is subjected to laser remelting treatment, spraying the AT13 ceramic environment barrier layer; and then carrying out heat treatment to obtain the NiCrAlY / TiC / AT13 self-healing coating. Through the synergistic effect of component design and the plasma spraying and laser remelting technology, the interlayer bonding energy between coatings is improved, good mechanical performance is achieved, and the mechanical performance of a base body is not reduced.
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Description

technical field

[0001] The invention relates to the technical field of protective coatings for metal materials, in particular to a self-healing coating with improved interlayer binding energy and a preparation method thereof. Background technique

[0002] Deposition of ceramic coatings on metal substrates combines the advantages of ceramic materials and metal substrate materials to obtain an ideal composite coating material, which has been applied in many fields. Due to the different physical property parameters of the metal material substrate and the ceramic coating material, the preparation and work of the ceramic coating may generate large internal stress; and the ceramic coating prepared by simply using the spraying technology, the ceramic coating is different from that of the ceramic coating. The bonding of matrix materials is mainly mechanical bonding, and the coating has a layered structure with poor compactness. There are often a large number of pores in the ceramic ...

Claims

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