Isothermal Section of Zr-Fe-Cu Ternary System at 700 degrees C

The isothermal section of the Zr-Fe-Cu ternary system at 700 degrees C was investigated by X-ray diffraction, scanning electron microscope and energy disperse analysis. Two Zr-Fe-Cu ternary phase, Zr(Fe,Cu) and Zr-2(Fe,Cu), named tau(1) and tau(2), respectively, are found in this section. Seven binary phases, Fe2Zr, FeZr3, CuZr2, Cu10Zr7, Cu8Zr3, Cu51Zr14 and Cu5Zr, are confirmed to be stable at this temperature. Large amount of Fe (18.6 at%) is observed to solute in Cu51Zr14. In addition, the oxygen stabilized phase Fe23Zr6 isn't observed in Zr-Fe-Cu ternary system.