THE INVESTIGATION OF TiB₂-SiC COMPOSITE MATERIALS HIGH-TEMPERATURE OXIDATION FOR PROTECTIVE HVOF-COATINGS SPRAYING

M.S. Storozhenko A.P. Umansky,S. S. Chuprov

High temperature oxidation of TiB₂-20mass.%SiC composite material has been investigated and influence of plating with nickel on material oxidation resistance has been established. At temperature up to 1000 ^oC TiB₂-20mass.%SiC composite material oxidation has two stages and results in formation В₂О_3, SiO₂ TiO₂ oxides which form protective film and prevent further oxidation. It has been shown that TiB₂-SiC composite material plating with nickel results in the increasing temperature of material intensive oxidation up 122 ^оС. The plating with nickel results in fusion of ceramic powder at high temperature up to 1000 ^oC.

Key words: high-temperature oxidation, titanium boride, silicone carbide, nickel, plating, high velocity oxy-fuel spraying, coating.