DEVELOPMENT AND PRODUCTION OF FeAl BASED INTERMETALLIC ALLOYS

Intermetallic materials have long been considered as potential candidates for high temperature applications due to their high strength/weight ratio, oxidation resistance, and corrosion resistance. The recent alloy design approaches undertaken by many researchers around the world allowed design of intermetallics for high strength application. Environmental embrittlement, solidification porosity, and low ductility of FeAl alloys necessitated innovative ways of processing FeAl sheets based on powder metallurgical route as opposed to an ingot route. Excellent sheets of FeAl have been processed by roll compaction followed by sintering technique using water atomized FeAl powder. Gas atomized FeAl powder was used to obtain sheets of FeAl by tape casting technique. Plasma spray technique was employed to obtain coating of FeAl alloy.