High temperature coating containing zirconium oxide active diffusing barrier and preparation method thereof

Abstract

The invention relates to the high temperature coating technology, and in particular relates to a high temperature coating containing zirconium oxide active diffusing barrier and a preparation method thereof. The high temperature protective coating comprises a zirconium oxide active diffusing inner layer and an anti-high temperature oxidizing protective layer. The zirconium oxide inner layer can be spontaneously converted into a multilayer film structure comprising aluminum oxide / metal / aluminum oxide in the using process, so that mutual diffusion between the anti-high temperature oxidizing protective layer and a base body can be resisted, and the coating has good binding strength and thermal stability, so that effective antioxidant components in the anti-high temperature oxidizing protective layer are prevented from diffusing to the base body, and therefore, the service life of the high temperature coating is prolonged, and the mechanical performance of the base body is not damaged. The preparation method comprises the following steps of: first, preparing a zirconium oxide layer on the surface of the base body by an electron beam physical vapor deposition method; and then, preparing the anti-high temperature oxidizing protective layer on the active diffusing barrier by one of a vacuum physical vapor deposition method, a chemical vapor deposition method, a thermal spraying method and the like or combination thereof.

Description

technical field

[0001] The invention relates to a high-temperature coating technology, in particular to a high-temperature coating containing a zirconia active diffusion barrier coating for alloy high-temperature protection and a preparation method thereof. Background technique

[0002] With the continuous improvement of engine efficiency, in order to ensure that the engine blades made of superalloys have both good high-temperature mechanical properties and excellent high-temperature corrosion resistance, applying MCrAlY high-temperature protective coatings on the surface of the blades is an effective way. However, the increase of the service temperature of the engine intensifies the interdiffusion of alloy components between the alloy matrix and the protective coating, and accelerates the degradation of the matrix / coating system. The main manifestations are: (1) the beneficial components Al and Cr are protected by MCrAlY The coating diffuses to the substrate, and W, Ta, Mo ...

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