Improved Technology for Heat-Shielding Coating Application onto Turbine Blades

The purpose of this research was to review melt crystallization in a free and limited volume. We analyzed the formation of heat-shielding coatings obtained by plasma and electron-beam method. Previous research provides a heat-shielding coating with the columnar structure obtained using the method of suspensions, representing nano-sized powders in liquid media. When spraying, the suspense evaporates and the coating is formed from the vapor phase in the form of a columnar structure. This structure is obtained by an expensive electron-beam method and it has a higher heat resistance than plasma lamellar structure obtained from powders. The method is cost-effective; however, its performance is poor. We proposed an effective technique of applying coating with a columnar structure in the chamber with reduced pressure.

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