Abstract
Abstract A neutron diffraction study on liquid Al – Ni alloys close to the liquidus temperature is presented. By applying an aerodynamic levitation technique associated with CO2 laser heating, it was possible to investigate the high-melting alloys around the equi-atomic composition, too. We observe a change in the local chemical atomic arrangement from preferred environing of like atoms in Al-rich alloys to hetero-coordination in the Ni-rich alloys. It is furthermore demonstrated that the apparent pre-peak can be attributed to a distinct Ni–Ni short-range order.
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