SELECTION OF PROTECTIVE COATINGS OBTAINED BY PLASMA-SPRAYING METHOD FOR FOUNDRY INDUSTRY

Abstract

This article presents results from the studies of protective coatings applied to industrial graphite molds used for the casting of non-ferrous metals. The selection of coatings was based on the results of measurements of surface wettability by liquid copper and microstructure examinations. The study involved industrial graphite molds with single-layer protective coatings of Al 2 O 3 + 30%C and ZrO 2 -Y 2 O 3 + 30%C as well as two-layer protective coatings of Al 2 O 3 + 30%C /glassy carbon and ZrO 2 -Y 2 O 3 + 30%C /glassy carbon.