Regensburg 2007 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 3: Liquid and amorphous materials I

MM 3.1: Vortrag

Montag, 26. März 2007, 10:15–10:30, H4

Neutron scattering investigatons on melts of Al-Ni and Zr-Ni alloys — •Dirk Holland-Moritz¹, Andreas Meyer¹, Helena Hartmann¹, Sebastian Stüber², and Fan Yang² — ¹Institut für Materialphysik im Weltraum, DLR-Köln, Germany — ²Physik Department E13, TU-München, Germany

This work presents investigations on the short-range order of stable and deeply undercooled melts of binary Al-Ni and Zr-Ni alloys. The liquids were containerlessly processed and undercooled by use of the electromagnetic levitation technique which was combined with the technique of elastic neutron scattering at the diffractometer D20 of the Institut Laue-Langevin (ILL) in order to determine the static structure factor. The scattering contrast was varied by isotopic substitution. By means of this partial structure factors were determined. For the case of Zr₆₄Ni₃₆ alloys strong indications for the existence of a chemical order are found.

This work was supported by DFG under contracts No. Ho1942/6-3 and Me1958/2-3.