An Assessment of Binary Metallic Glasses: Correlations Between Structure, Glass Forming Ability and Stability (Preprint)

• Main Authors: Miracle, Daniel B, Louzguine-Luzgin, Dmitri, Louzguina-Luzgina, Larissa, Inoue, Akihisa
• Format: Report
• Language: English
• Subjects: AMORPHOUS MATERIALS; ATOMIC STRUCTURE; BINARY ALLOYS; BINARY METALLIC GLASSES; Ceramics, Refractories and Glass; CRYSTALLIZATION; GFA(GLASS FORMING ABILITY); GLASS; GLASS TRANSITION TEMPERATURE; INVERSE GLASS SYSTEMS; LIQUID PHASES; Mechanics; METALLIC GLASS; Metallurgy and Metallography; MICROSTRUCTURE; PE62102F; Physical Chemistry; SOLUTE ATOM FRACTION; SOLUTE-TO-SOLVENT RADIUS; STABILITY; TEMPERATURE; THERMAL PROPERTIES; THERMAL STABILITY; TOPOLOGY; WUAFRL4347RG00; WUAFRLM02R4000

The objective of this work is to explore the influence of the atomic structure of binary metallic glasses on glass-forming ability and thermal stability. A broad assessment of binary metallic glasses is given, with information on 619 distinct binary alloys from 162 binary glass systems. For each of these glasses, the structure is quantified with the efficient cluster-packing (ECP) model, using reported glass constitutions as input. The glass transition temperatures Tg, crystallization temperatures Tx, and liquidus temperatures Tl are taken from the literature to compute the thermal stability parameters Trg = Tg /Tl, Tx /Tl, delta(Tx) = Tx - Tg and gamma = Tx/(Tg + Tl). Comparison of the atomic structures with reported amorphous thickness and thermal stability parameters gives the following major results. Binary glasses show a strong preference for solute-to-solvent atomic radius ratios, R, that produce efficient local atomic packing, consistent with earlier results. In-house contract. Submitted for publication in International Materials Review.