Transmission electron microscopy study of the microstructure of a Ti-Fe-Zr alloy

A Ti–35Fe–30Zr (at.%) alloy was prepared by cold crucible levitation melting, and its microstructure was characterized. Electron microscope observations revealed a microstructure with a bi-modal phase size distribution. One phase was identified as a monoclinic TiFeZr compound with lattice parameters a=0.895nm, b=0.502nm, c=0.969nm, and α=119.4° in C2 (space group). A bcc β-TiZr phase with lattice parameter a=0.341nm coexisted with the monoclinic phase. The mechanisms of phase formation are discussed.