Morphology and Reaction Kinetics of Interface Phase Formed in Steel-aluminum Composite
The interface morphology,phase composition,microstructure evolution and phase precipitation rule of steel-aluminum composite were analyzed by SEM and EDS.The thickness of intermetallic compounds layer was quantitatively characterized by OM,and the growth mechanism of phase formed during interfacial reaction was discussed.The results show that primary phase forming during interfacial reaction is Fe2Al5.The interfacial reaction is restrained after silicon micro-alloying.The kinetics analysis indicate that the formation of intermetallic compounds are related with the activation energy and the content of reaction.The thickness of the intermetallic compounds layer is inversely proportional to the activation energy and amount of the content of reaction.