Eutectic ceramic thermal barrier material and preparation method thereof

A method for preparing a eutectic ceramic thermal barrier material, comprising the steps of:

• (1) Subjecting a nickel-based superalloy powder to laser cladding, and stacking layer by layer to obtain a nickel-based superalloy substrate;
• (2) Subjecting a NiCoCrAlY powder to laser cladding on a surface of the nickel-based superalloy substrate, and stacking layer by layer to obtain an intermediate binding layer;
• and
• (3) Subjecting a eutectic ceramic powder to laser cladding on a surface of the intermediate binding layer, stacking layer by layer to obtain a eutectic ceramic cladding layer, and then to obtain the eutectic ceramic thermal barrier material;
• and the eutectic ceramic powder comprises an Al2O3—Gd2O3 spherical powder or an Al2O3—Gd2O3—ZrO2 spherical powder;
• wherein the eutectic ceramic thermal barrier material comprises the nickel-based superalloy substrate, the intermediate binding layer and the eutectic ceramic cladding layer stacked sequentially;
• the intermediate binding layer comprises a NiCoCrAlY binding layer;
• the eutectic ceramic cladding layer comprises an Al2O3/GdAlO3 binary eutectic ceramic coating or an Al2O3/GdAlO3/ZrO2 ternary eutectic ceramic coating.