Self-propagating high-temperature synthesis of heat-resistant electrically conductive coatings based on Ni-Al and Ti-Al-C compounds

Abstract

Abstract Coatings based on aluminium nickelides and Ti2AIC Ti3AlC2 MAX-phases are obtained by the method of self-propagating high-temperature synthesis. The processes occurring in the powder mixture of nickel and aluminium, as well as in the titanium-aluminium-carbon mixture are studied. The effect of the thickness of the coating on the maximum temperature and velocity of combustion wave is found. The coating consists of small crystals NiAl, Ni3Al or Ti2AlC, Ti3AlC3, fused together. The coating has high electrical conductivity and can be used as heat-resistant protective coatings or electric heaters.