Phase equilibria of the Al-Cr-Pr ternary system at 773 K

Abstract The phase equilibria of the Al-Cr-Pr ternary system at 773 K have been experimentally determined based on results of X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray analysis. 2 ternary compounds, Al 20 Cr 2 Pr and Al 8 Cr 4 Pr, as well as 11 binary compounds, i. e. Al 7 Cr, Al 4 Cr, α-Al 9 Cr 4 , α-Al 8 Cr 5 , AlCr 2 , α-Al 11 Pr 3 , Al 3 Pr, Al 2 Pr, α-AlPr, AlPr 2 and β-AlPr 3 were confirmed. No compound was found in the Pr-Cr binary system. The isothermal section of the Al-Cr-Pr ternary system at 773 K consists of 15 three-phase regions, 30 two-phase regions and 16 single-phase regions. Homogeneity ranges of intermetallic compounds at 773 K have been determined.