Wear-resisting coating of YAG/8YSZ dual ceramic layer structure and plasma preparation method

Abstract

The invention discloses a wear-resisting coating of a YAG / 8YSZ dual ceramic layer structure and a plasma preparation method. According to the structure of the coating, a binding layer is prepared from NiCoCrAlY, a ceramic bottom layer is prepared from 8YSZ, and a ceramic top layer is prepared from YAG. The preparation method comprises the steps that 1, a base body is processed; 2, spray materials are pretreated; 3, the surface of the base body is cleaned; 4, the surface of the base body is subjected to abrasive blasting; 5, the surface of the base body is preheated; 6, the binding layer is prepared; 7, the binding layer is cooled; 8, the ceramic bottom layer is prepared, and particularly, dried ZrO2.8Y2O3 powder is used for preparing the ceramic bottom layer on the cooled binding layer through the plasma spraying technology; 9, the ceramic bottom layer is cooled, and particularly, the surface of the coating is subjected to air cooling to be cooled to 50-80 DEG C; 10, the ceramic top layer is prepared, particularly, the dried Y2Al5O12 powder is used for preparing the ceramic top layer on the cooled ceramic bottom layer through the plasma spraying technology; and 11, the coating is prepared after being naturally cooled to the indoor temperature.

Description

technical field [0001] The invention relates to coating preparation technology, in particular to the preparation technology of YAG / 8YSZ double ceramic layer heat-resistant plasma cermet coating. Background technique [0002] In the aviation industry, energy power industry, and metallurgical and chemical industries, some metal parts need to have excellent high-temperature strength and good high-temperature oxidation and corrosion resistance; such as aero-engine hot-end parts, various gas turbine hot-end end parts etc. With the development of industry, the performance requirements of these hot-end components are getting higher and higher; the sustainable development of the country and society needs to increase the service life of these components and reduce the preparation or repair costs of these parts. At present, the most feasible way is to coat the surface of the metal parts with a protective coating, so that the alloy material can not only maintain the strength at high t...

AI Technical Summary

Problems solved by technology

Therefore, a thermal barrier coating using only a single ceramic layer 8YSZ cannot provide sufficient protection for the metal oxygen gun tip

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