Ceramic thermal barrier coating on surface of metal base body and application of ceramic thermal barrier coating in engine

Abstract

The invention discloses a ceramic thermal barrier coating on the surface of a metal base body and application of the ceramic thermal barrier coating in an engine, and belongs to the technical field ofceramic coatings. A bonding layer and the ceramic thermal barrier coating are sequentially prepared on the surface of the metal base body, wherein the preparation raw material of the ceramic thermalbarrier coating is Y2O3 powder and Zr2O3 powder, or the preparation raw material of the ceramic thermal barrier coating is gamma-Al2O3, a chromium magnesium phosphate binder and BN powder, or the preparation raw material of the ceramic thermal barrier coating is gamma-Al2O3 and SiO2. nH2O; and the ceramic thermal barrier coating is further coated with an oxidation catalyst, and the porosity of theoxidation catalyst is larger than that of the bonding layer. According to the ceramic thermal barrier coating on the surface of the metal base body and the application of the ceramic thermal barriercoating in the engine, the prepared ceramic thermal barrier coating is applied to the engine, and the oxidation catalyst added in the ceramic thermal barrier coating can utilize excessive hydrocarbonand carbon monoxide and oxidize the hydrocarbon before the hydrocarbon is converted into deposited carbon, so that the fuel enrichment during cold start is reduced, the emission of the hydrocarbon andthe carbon monoxide is reduced, and the preignition phenomenon caused by carbon deposition can be prevented.

Description

technical field

[0001] The invention relates to the technical field of ceramic coatings, in particular to a ceramic thermal barrier coating on the surface of a metal substrate and its application in engines. Background technique

[0002] In order to improve the efficiency of the engine or gas turbine and reduce carbon emissions, its combustion temperature is required to be higher and higher. However, the excessively high temperature brings a more severe service environment to the metal parts of the heat engine, and the ordinary single crystal or superalloy has reached the limit of use. , it is difficult to meet the requirements. To solve this problem, thermal barrier coating technology has been widely used in recent years. Ceramic thermal barrier coatings have the functions of heat insulation, wear resistance, corrosion resistance and oxidation resistance, and are widely used in aerospace, aviation and energy fields, especially in high-pressure turbine blades, combustion ch...

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