Phase equilibria of the Al–Pr–Zr ternary system at 773 K

The phase equilibria of the Al–Pr–Zr ternary system at 773 K have been investigated mainly by means of X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and differential thermal analysis (DTA). The 14 binary compounds, i.e. AlZr3, AlZr2, Al2Zr3, Al3Zr4, AlZr, Al3Zr2, Al2Zr, Al3Zr, α-Al11Pr3, Al3Pr, Al2Pr, β-AlPr, AlPr2 and β-AlPr3 were confirmed. No binary compound was found in the Pr–Zr binary system. The result shows that the isothermal section of the Al–Pr–Zr ternary system at 773 K consists of 17 single-phase regions, 31 two-phase regions and 15 three-phase regions. All the intermediate compounds phases in this system have not a remarkable solid solution at 773 K. No ternary compound is found in this work.