Method for preparing thermal barrier coating by laser compound plasma spraying

A thermal barrier coating, plasma technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problem of difficult to give full play to surface purification and roughening, can not effectively improve the interface bonding strength, prolong the service life, etc. The problem is to overcome the incomplete purification, improve the thermal shock resistance and mechanical properties, and improve the bonding strength of the interface.
CN101768714AInactive Publication Date: 2010-07-07JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2010-07-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a thermal barrier coating by laser compound plasma spraying, which relates to the field of surface coatings. The method comprises the following steps: 1) cutting a material to be treated into required size by adopting line cutting; 2) polishing the surface of the cut material by using abrasive paper; 3) cleaning the surface of the polished material by adopting pulse laser; 4) performing laser texturing treatment on the surface of the cleaned material to roughen the surface of the material; and 5) filling spraying material powder into a powder feeder, fixing the roughened material on a turntable, and preparing the thermal barrier coating by plasma spraying; or first preparing a middle adhesive layer, then repeating the cleaning and texturing processes in the steps 3) and 4), and preparing the thermal barrier coating by the plasma spraying process. The interface of the thermal barrier coating prepared by the method is firmly combined, and the thermal shock resistance and mechanical property of the thermal barrier coating are remarkably improved. The method has simple processes, is suitable for large-scale mass production, and can prepare the high-performance thermal barrier coating with firm interface combination.
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Description

technical field

[0001] The invention relates to the field of surface coating materials, in particular to a method for preparing a thermal barrier coating by laser composite plasma spraying. Background technique

[0002] Thermal barrier coatings refer to ceramic coating materials with excellent thermal insulation properties, usually consisting of a metal bonding layer and a heat-resistant oxide ceramic layer. Thermal barrier coatings can effectively reduce the operating temperature of high-temperature components and avoid high-temperature oxidation, corrosion, and wear. Currently, they are widely used in high-temperature components such as jet engines, gas turbine blades, guide vanes, airfoils, and turbine propellers.

[0003] The concept of thermal barrier coating was proposed in the early 1950s, and the earliest used thermal barrier coating material was ZrO 2 Ceramics have high melting point, low thermal conductivity, good thermal shock resistance, large thermal expansion ...

Claims

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