PROTECTION OF CARBON MATERIALS FROM HIGH-TEMPERATURE GAS CORROSION

A study is made of composite carbon-borosilicide on carbon materials p repared by gas-phase deposition, diffusion impregnation, liquid-phase impregnation, and fusion. It is shown that multilayer coatings prepare d from carbon-borosilicide materials, particularly silicon and titaniu m carbides, and molybdenum, tungsten, and hafnium borides and silicide s have greater heat resistance in the temperature range 1500-2000 degr ees C in air. Their protective properties are strongly dependent on co mposition, coating structure, and preparation methods as well of the g rade of the original carbon materials.