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MM: Fachverband Metall- und Materialphysik
MM 65: Liquid & Amorphous Metals II
MM 65.6: Talk
Thursday, March 14, 2013, 18:30–18:45, H26
Structure formation in binary amorphous Al alloys with early transition metals from the 4th, 5th, and 6th period — •Martin Stiehler1, Danny Müller2, Michael Pleul1, and Peter Häussler1 — 1Chemnitz University of Technology, 09107 Chemnitz, Germany — 2now at Roth & Rau AG, 09337 Hohenstein-Ernstthal, Germany
Amorphous phases as precursors of the crystalline state are indispensable model systems to study fundamental structure forming processes and the related evolution of electronic transport. During the last years we were able to show that many different classes of alloys organize themselves under the influence of a resonance between the global subsystems of the electrons on the one hand and the static structure on the other hand. Especially for binary Al-TM alloys (TM: the transition metals of the 4th period Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu) we already reported on an electronic influence on phase stability involving hybridization effects between the Al-p- and the TM-d-states.
In this contribution we report on an extension of these investigations to systems with transition metals of the 5th and 6th period. Especially, we will present results on structural and electronic properties of the binary systems Al-(Sc,Y,La,Ce) in the amorphous state. Although the four systems contain early transition metals from three different periods of the periodic table, they exhibit very similar properties, seemingly related to a mean valency of 1,5e/a in terms of the resonance model.