Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 48: Topical session: Dynamics, relaxation and deformation in deeply supercooled metallic liquids and glasses III - plasticity and hetererogeneities

MM 48.2: Vortrag

Mittwoch, 22. März 2017, 16:15–16:30, IFW A

Local mechanical properties of ultrastable metallic glass — •Thomas Dziuba, Yuansu Luo, and Konrad Samwer — I. Phys. Intitut, Univ. Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

The recent discovery of so called ultrastable metallic glasses led to great opportunities for experimental examinations which may not only give insight to the physical properties of such glasses but also to the glass-forming process in general [1]. In this context, the talk will give an overview on our experimental work using vapor deposition to create different ultrastable CuZr-glasses. Especially the use of Atomic-Force-Acoustic-Microscopy (AFAM) makes the measurement of elastic properties on a nanometer-scale possible. Comparisons with ordinary glassy systems and crystalline material reveal the energetic state during the formation of the solid and line up perfectly with theoretical considerations and simulations. Therefore, information about the behavior of systems in the context of the potential energy landscape (PEL) could be derived and will be presented. Also, the influence of temperature and deposition rates on the formation of different phases in the solid was evaluated by using XRD-techniques. Here the goal is not only to understand the nature of ultrastable metallic glasses but additionally to gain the ability to tune such materials for optimal mechanical properties.

Acknowledgement: DFG-FG 1394 PI

[1] H. B. Yu, Y. Luo and K. Samwer: Ultrastable Metallic Glass. In: Adv. Mater. 25, 5904-5908 (2013)