A study of the Al-rich region of the Al–Cu–Mo alloy system

Partial isothermal sections at 810, 700 and 585 °C are presented for a high-Al compositional range of Al–Cu–Mo. The maximal solubility of Cu in the Al5Mo phase(s) was found to be ∼3 at.%. The previously reported Al3Ti-type phase was found to be formed around the Al68.5Cu6.5Mo25 composition. The other ternary phase forming in a small compositional range around Al7Cu2Mo has a hexagonal structure with a = 0.86796(8) and c = 1.51948(12) nm.