The ternary Cr-Al-Nb phase diagram: Experimental investigations of isothermal sections at 1150, 1300 and 1450 °C

► Isothermal sections of the Cr-Al-Nb phase diagram at 1150, 1300, and 1450 °C. ► Extended phase fields of cubic C15 and hexagonal C14 Laves phase Nb(Cr,Al)2. ► C14 Nb(Cr,Al)2 is the only ternary intermetallic phase. ► Small C15 + C14 two-phase field shifts to lower Al content with increasing temperature. ► Laves phase has a structure-type-independent volume per atom.