Icosahedral ordering in Ti–Hf–Ni alloys?

Abstract The local atomic structure of crystalline and amorphous Ti–Hf–Ni alloys has been probed by EXAFS. The local order is similar in the crystalline Ti–Hf–Ni alloy and in Ti–Zr–Ni crystalline and quasicrystalline phases, where icosahedral ordering exists around some nickel sites. The local atomic structure is different in the amorphous Ti–Hf–Ni alloys, in particular around the nickel atoms, where a new icosahedral atomic configuration that is similar to that in the Ti 2 Ni crystal phase is identified.