Thermal barrier coating material with closed surface layer and preparation method thereof

A technology of thermal barrier coating and surface layer, applied in coating, metal material coating process, melt spraying and other directions, which can solve problems such as loose and porous
CN103993254AInactive Publication Date: 2014-08-20JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2014-08-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

Belonging to the technical field of thermal barrier coating surface treatment and modification, the invention in particular relates to a thermal barrier coating material with a closed surface layer and a preparation method thereof. The coating material comprises a metal bonding layer, a rough and porous ceramic surface layer and a cylindrical crystal remelted layer with a closed surface layer. The invention also discloses a preparation method of the thermal barrier coating material with a closed surface layer, and the method includes: depositing the metal bonding layer on the surface of a high temperature alloy substrate by plasma spraying, then depositing the ceramic layer on the surface of the bonding layer, and finally conducting irradiation treatment on the ceramic layer by a high current pulsed electron beam technology, thus forming the closed cylindrical crystal remelted layer. The thermal barrier coating material with a closed surface layer prepared by the composite technology can effectively block invasion of external harmful gas and improve the strain tolerance and thermal shock performance of the coating, and has good high temperature service performance, thus being an ideal thermal barrier coating.
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Description

technical field

[0001] The invention belongs to the technical field of thermal barrier coating surface treatment and modification, and in particular relates to a thermal barrier coating material with a closed surface layer and a preparation method thereof. Background technique

[0002] In the field of aerospace technology today, with the development of aviation gas turbines in the direction of high flow ratio, high thrust-to-weight ratio, and high turbine inlet temperature, the gas temperature and gas pressure in the combustion chamber continue to increase. Compared with the development of new high-temperature heat-resistant alloy materials Generally speaking, applying thermal barrier coatings to high-temperature hot-end components is the most effective method.

[0003] In practical applications, typical aerospace thermal barrier coatings (TBCs) mostly adopt a double-layer structure: a ceramic surface layer (TC) for thermal insulation and a metal bonding layer (BC) to improv...

Claims

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