Preparation method of high-entropy ceramic-aluminum oxide composite coating

The invention discloses a preparation method of a high-entropy ceramic-aluminum oxide composite coating. The method comprises the following steps that S1, oxide/silicon carbide/aluminum composite powder for thermal spraying is prepared, wherein the oxide is any five or more of zirconium oxide, titanium oxide, hafnium oxide, tantalum oxide, niobium oxide, vanadium oxide, chromium oxide, molybdenumoxide, tungsten oxide, manganese oxide or cobalt oxide; S2, the surface of base materials required by the coating is pretreated; and S3, the oxide/silicon carbide/aluminum composite powder is sprayedon the surface of the base materials by adopting a thermal spraying method, thereby obtaining the high-entropy ceramic-aluminum oxide composite coating through in-situ synthesis. According to the preparation method, the coating overcomes the defect that the high-entropy ceramic composite powder needs to be prepared in advance in the process of preparing the high-entropy ceramic composite coating in the prior art. 本发明为一种高熵陶