Preparation method of thermal barrier coating containing long-service-life antioxidant bonding layer

A thermal barrier coating, anti-oxidation technology, used in coatings, metal material coating processes, ion implantation plating, etc., can solve the problem that the high temperature mechanical properties and anti-oxidation properties of coatings cannot fully meet the needs Preparation of thermal barrier coating, low yield strength at high temperature, etc., to achieve the effect of dense and continuous oxide layer, excellent oxidation resistance, and uniform composition structure
CN104630686AInactive Publication Date: 2015-05-20HENAN PULAIMU COATING TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENAN PULAIMU COATING TECH
Publication Date
2015-05-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of a thermal barrier coating containing a long-service-life antioxidant bonding layer. The preparation method comprises the following steps: (1) sequentially performing deoiling and sand blasting treatment on a high-temperature alloy matrix; (2) preparing a metal bonding layer on the high-temperature alloy matrix by virtue of atmosphere plasma spraying, low-pressure plasma spraying, high-speed oxygen flame spraying or high-speed compressed air flame spraying; and (3) then depositing a ceramic layer on the metal bonding layer by virtue of atmosphere plasma spraying, high-speed oxygen flame spraying, supersonic plasma spraying, solution plasma spraying or electron beam physical vapor deposition. Compared with the prior art, the thermal barrier coating prepared by using an FeCrAlY bonding layer, disclosed by the invention, has higher working temperature and slower oxidation layer growth rate compared with that of a conventional MCrAlY thermal barrier coating (M refers to Ni and Co) so as to avoid the interfacial properties of the bonding layer and the ceramic layer from forming a brittle Ni2Al2O4 phase; and the thermal barrier coating has excellent high-temperature oxidation resistance and longer service life.
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Description

technical field

[0001] The invention relates to the field of thermal barrier coatings, in particular to a preparation method of a thermal barrier coating containing a long-life anti-oxidation bonding layer. Background technique

[0002] Thermal barrier coatings usually refer to ceramic coatings that are deposited on metal surfaces and have good heat insulation effects. They are mainly used to reduce the working temperature of the substrate and prevent high-temperature oxidation, corrosion, and wear. A coating system consisting of a thermal insulation layer and a ceramic layer with thermal insulation effect. It is of great significance to ensure the long-term service of hot-end components such as gas turbines and engines, and the bonding layer is an important part of the thermal barrier coating of gas turbines, and its performance directly affects the life of the thermal barrier coating system. At present, the composition of the bonding layer is mainly MCrAlY (M=Ni, Co) and ...

Claims

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