Phase equilibria in Cu-Al-Zr system at 1073 K and aluminum concentration of less than 55 at %

Abstract

X-ray diffraction and electron probe microanalysis were used to investigate phase equilibria in the ternary Cu-Al-Zr system at 1073 K in the Zr-rich region. The fragment of the isothermal section of the system was plotted. The regions of homogeneity of the ternary ZrCu2Al and ZrCu x Al2 − x phases were investigated. The type of phase equilibria between binary and ternary compounds of the Al-Cu-Zr system was established. It was found out that, at a Zr concentration above 55 at %, ternary compounds are not formed, and the Zr3Al and Zr2Cu phases were in equilibria with α-Zr at 1073 K.