Dresden 2017 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 4: Topical session: Dynamics, relaxation and deformation in deeply supercooled metallic liquids and glasses I - Structural Transitions
MM 4.3: Vortrag
Montag, 20. März 2017, 11:00–11:15, IFW A
Signature of the atomic structure in the thermophysical properties of flint and metallic glasses — •Simon Hechler1, Isabella Gallino1, Moritz Stolpe1, Frank-Thomas Lentes2, and Ralf Busch1 — 1University of the Saarland, 66123 Saarbrücken, Germany — 2Schott AG, 55122 Mainz, Germany
Flint glasses are silicates with large lead oxide content. From the experimental point of view, these glasses are the ideal network glass formers to compare metallic glasses with as they exhibit comparable glass transition temperatures. Metallic glasses are multicomponent atomic glass formers. The structure of these two types of glasses is completely different. Flint glasses build networks by connecting silicon and lead over bridging oxygen atoms with covalent or even ionic bondings. Metallic glasses have non-directional metallic bonds and a less ordered clustered structure. The differences in the structure of these materials manifests in their thermophysical properties like the specific heat capacity and viscosity. For understanding the structure property relationship in glasses, three flint glasses with different lead content are investigated in terms of specific heat capacity and viscosity and compared to metallic glass formers.