SKM 2023 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 12: Poster I
MM 12.36: Poster
Monday, March 27, 2023, 18:15–20:00, P2/OG1+2
Fracture surface energy of glasses obtained from crystalline structure and bond energy data — •Marco Holzer1, Tina Waurischk1, Janine George1,2, Robert Maaß1,3, and Ralf Müller1 — 1Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany — 2Institute of Condensed Matter Theory and Solid-State Optics at Friedrich Schiller University, Jena, Germany — 3Department of Materials Science and Engineering at University of Illinois, Urbana-Champaign, USA
Extending our earlier work on nucleation and surface energies [1], we present a simple approach for predicting the fracture surface energy (g) of oxide glasses using readily available crystallographic structure data and diatomic bond energies. The proposed method assumes that (g) of a glass equals the surface fracture energy of the weakest fracture (cleavage) plane of the isochemical crystal. For non-isochemically crystallizing glasses, an average (g) is calculated from the weighed fracture energy data of the constitutional crystal phases according to Conradt [2]. Our predictions yield good agreement with the glass density- and chemical bond energy-based prediction model of Rouxel [3] and with experimentally obtained (g) values known at present. [1] C. Tielemann, S. Reinsch, R. Maass, J. Deubener, R. Müller, J. Non-Cryst. Solids 2022, 14, 100093 [2] R. Conradt, J. Non-Cryst. Solids 2004, 345-346, 16 [3] R., Tanguy, Scripta Materialia 2017, 109-13, 137