Hafnium diboride-silicon carbide-tantalum disilicide-gadolinium oxide composite coating and preparation method thereof

The invention provides a hafnium diboride-silicon carbide-tantalum disilicide-gadolinium oxide composite coating and a preparation method thereof, and belongs to the technical field of composite coatings. According to the invention, hafnium diboride-silicon carbide-tantalum disilicide-gadolinium oxide composite powder is used as a raw material of the coating, so that not only is relatively strong high-temperature oxidation resistance of hafnium diboride-silicon carbide of a traditional system maintained, but also crystal transformation of an oxide is stabilized and a glass phase is supplemented by using a tantalum disilicide adding phase; and the gadolinium oxide adding phase is used for improving the overall emissivity of the coating and enhancing the viscosity of the glass phase, so that the high-temperature oxygen corrosion resistance of the coating is further improved. The coating is prepared in an atmospheric plasma spraying mode, the method has the advantages of being simple in process, easy to control,