Phase equilibria in the Fe–Nb–Zr ternary system at 1,200 °C

Abstract

Abstract Phase equilibria in the Fe–Nb–Zr system at 1,200 °C were determined by X‐ray diffraction (XRD) and scanning electron microscope (SEM) coupled with energy‐dispersive X‐ray spectroscopy (EDS) techniques. Extensive NbFe 2 domain was proposed in the current work. This compound existed in the composition range from 35 at% to 73 at% Fe, 12 at% to 32 at% Nb, and 0 to 32 at% Zr. In the present work, four three‐phase regions (1) β−(Nb,Zr) + NbFe + NbFe 2 , (2) β−(Nb,Zr) + NbFe 2 + Liquid, (3) NbFe 2 + Liquid + ZrFe 2 , and (4) ZrFe 2 + Fe + NbFe 2 , were established.