High-entropy metal oxide coating as well as preparation method and application thereof

The invention relates to a high-entropy metal oxide coating as well as a preparation method and application thereof, and relates to the technical field of coatings. The preparation method comprises the following steps: firstly, preparing a metal salt solution, preheating a matrix to 300-500 DEG C, and oxidizing and depositing the metal salt solution on the surface of the matrix through a spray gun by adopting a plasma spraying technology to obtain the high-entropy metal oxide coating; the concentration of each metal salt in the metal salt solution is 0.1-0.4 mol/L; the feeding flow of the metal salt solution is 5-50 mL/min; the power of the spray gun ranges from 28 kW to 40 kW, the current ranges from 790 A to 850 A, the voltage ranges from 38 V to 44 V, the spraying distance ranges from 50 mm to 200 mm, the temperature of a flame core ranges from 10000 K to 15000 K, and the moving speed ranges from 100 mm/s to 1000 mm/s; the number of spraying cycles is 2-50. According to the high-entropy metal oxide coating