Al-rich region of Al–Pd–Ru at 1000 to 1100 °C

Partial isothermal sections of the Al–Pd–Ru phase diagram at 1000, 1050 and 1100 °C are presented here. The Al–Pd orthorhombic ɛ-phases dissolve up to ∼15.5 at.% Ru, Al13Ru4 <2.5 at.% Pd and Al2Ru up to 1 at.% Pd. Between 66 and 75 at.% Al, ternary quasiperiodic icosahedral phase and three cubic phases: C (Pm3¯, a = 0.7757 nm), C1 (Im3¯, a = 1.5532 nm) and C2 (Fm3¯, a = 1.5566 nm) were revealed. An additional complex cubic structure with a ≈ 3.96 nm was found to be formed at compositions close to those of the icosahedral phase.