Heterogeneous composite coating as well as preparation method and application thereof

The invention discloses a heterogeneous composite coating as well as a preparation method and application thereof, and belongs to the technical field of coatings. Comprising a nitrogen-containing gradient change metal layer, a composite gradient nitride ceramic layer and a nano multi-layer high-entropy coating, the nanometer multi-layer high-entropy coating is deposited on the composite gradient nitride ceramic layer, the composite gradient nitride ceramic layer is deposited on the metal layer, and the metal layer is deposited on the surface of the matrix. The heterogeneous composite coating provided by the invention has high hardness, fracture toughness, thermal stability, oxidation resistance and wear resistance; wide application prospects are realized in the aspects of cutting tools, molds and other corrosion-resistant and wear-resistant accessories. The preparation method of the heterogeneous composite coating has the advantages of being low in production cost, environmentally friendly and the like. 本发明公开