Dresden 2006 – wissenschaftliches Programm
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MM: Metall- und Materialphysik
MM 3: Symposium Modern Metallic Materials Design I
MM 3.5: Vortrag
Montag, 27. März 2006, 11:45–12:00, IFW B
Single-crystal growth of complex metallic alloy phases — •Michael Feuerbacher1, Marc Heggen1, Carsten Thomas1, Ze Zhang2, and Ke Hsin Kuo2 — 1Institut fuer Festkoerperforschung, Forschungszentrum Juelich GmbH, 52425 Juelich, Germany — 2Beijing Laboratory of Electron Microscopy, 100080 Beijing, China
Complex metallic alloys represent a new field in materials science recently attracting increasing interest. The characteristic features of this class of materials are large lattice parameters, a high number of atoms per unit cell, and a local order which is determined by a cluster substructure frequently involving icosahedral atom configurations. The physical properties of these materials are widely unexplored, which is mainly due to the unavailability of high-quality sample materials. The growth of complex metallic alloys is in many cases difficult as the phases solidify incongruently, their primary solidification area in the phase diagrams are small, etc. Therefore, advanced growth methods have to be applied. We have developed single-crystal growth routes for a variety of complex metallic alloy phases employing Czochralski-, Bridgman,- and self-flux growth techniques. The spectrum of phases produced covers different structure types, different types of local order and elemental constituents and represents a solid materials basis for the experimental exploration of the physical properties of this class of materials. In the present contribution we report on the current state-of-the-art in materials production of complex metallic alloy phases.