Relationship between the crystallographic structure of electrodeposited Fe-Zn alloy film and its thermal equilibrium diagram

The microstructures and morphologies of Fe-Zn alloys electrodeposited at di fferent chloride bath compositions have been studied in detail by using TEM , SEM, XRD, and compared to those appearing in the Fe-Zn thermal equilibriu m phase diagram. The results indicate that the alpha, Gamma, Gamma (1) and eta phases appear in the Fe-Zn electrodeposits, whereas 8 and phases which appear in the thermal equilibrium phase diagram do not appear. The surface appearance and microstructure of the intermetallic phases in Fe-Zn alloy el ectrodeposits depend on the Zn content in the Fe-Zn alloy deposit. It was a lso found that there is an orientation relationship among the Gamma, Gamma (1), and eta phases when these three phases appear simultaneously.