A contribution to the Al–Ir phase diagram

The Al–Ir phase diagram was specified in the range between 65 and 90 at.% Al. We confirmed the congruent melting of the Al2.7Ir phase, which forms a eutectic with AlIr. At higher Al concentrations four intermediate phases were found to be formed by a cascade of peritectic reactions: Al3Ir at 1466 °C, Al28Ir9 at 1446 °C, Al45Ir13 at 993 °C and Al9Ir2 at 877 °C. Their structures reported in the literature were confirmed.