Short-range order of undercooled melts of PdZr2 intermetallic compound studied by X-ray and neutron scattering experiments
1 Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt, DLR 51170 Köln, Germany, EU
2 Physics Department, Washington University - St. Louis, MI 63130, USA
Received: 9 April 2013
Accepted: 29 April 2013
The short-range order in undercooled melts of the intermetallic Zr2Pd glass-forming alloy is investigated by combining electrostatic levitation (ESL) with high-energy X-ray diffraction and neutron diffraction. Experimentally determined structure factors are measured and analyzed with respect to various structures of short-range order. The comparative X-ray and neutron scattering experiments allow for investigations of topological and chemical short-range order. Based on these studies, no preference of a specific short-range order is found for the liquid Zr2Pd glass-forming alloy, even in the metastable state of the deeply undercooled melt. This is in agreement with an earlier report from X-ray diffraction and molecular-dynamics studies of a Zr75.5Pd24.5 liquid, which showed a broad distribution of cluster types. The results for the Zr2Pd liquid are discussed with respect to the glass-forming ability of this melt.
PACS: 61.25.Mv – Liquid metals and alloys / 61.05.cf – X-ray scattering (including small-angle scattering) / 61.05.fg – Neutron scattering (including small-angle scattering)
© EPLA, 2013