Identification of the Fe-Zn Intermetallic Phases by TEM

Abstract

A series map of selected area electron diffraction patterns (SADPs) and the microstructure criteria for the intermetallic phases in the Fe-Zn system, i.e., Γ (Fe₃Zn₁₀-bcc), Γ₁ (FeZn₄ or Fe₅Zn₂₁-fcc), δ_1k (FeZn₇-superlattice hexagonal), δ_1p (FeZn₁₀-hexagonal) and ζ (FeZn₁₃-base centered monoclinic) were investigated by transmission electron microscopy (TEM). Following results are obtained:(1) A series of SADPs are very powerful handy-tools to identify each of the intermetallic phases in the Fe-Zn system. (2) Each of the intermetallic phases shows a characteristic microstructure such as dislocations, antiphase domain boundaries (APB) and stacking faults (SF).