DIFFUSION-RESISTANT HIGH-ENTROPY ALLOY COATING MATERIAL, HEAT RESISTANT COATING MATERIAL, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

摘要

A diffusion-resistant high-entropy alloy coating material and a heat resistant coating material, comprising a substrate and a diffusion-resistant high-entropy alloy coating. The diffusion-resistant high-entropy alloy coating comprises the elements: Al, Co, Cr, Ni, and Mo. The heat resistant coating material is obtained by forming the aforementioned diffusion-resistant high-entropy alloy coating on the substrate, and then, using same as a base material, forming a heat resistant coating thereon. By utilizing a unique slow diffusion effect of the diffusion-resistant high-entropy alloy coating and good physical and chemical matching thereof with both the substrate and the heat resistant coating, it is possible to effectively inhibit mutual diffusion of alloy components and harmful phase precipitation at the contact surface between the substrate and the coating, and improve the high temperature oxidation resistance capability of the coating. The heat resistant coating material can be applied in the preparation of hot-end parts of aeronautical engines or gas turbines to improve the service life and working reliability of the parts.