Fragility of iron-based glasses
| Autor: | William L. Johnson, Marios D. Demetriou, Jong Hyun Na |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Applied Physics Letters. 99:161902 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.3651763 |
| Popis: | The viscosity of various iron-based bulk-glass-forming liquids is measured around the glass transition, and the associated fragility is calculated. Fragility is found to vary broadly between compositions, from a low value of ~43, which indicates fairly “strong” liquid behavior, to ~65, well within the region of “fragile” behavior. Despite a strong covalent bonding identified in the structure of this class of metal/metalloid glasses, their liquid fragility can be remarkably high, exceeding even the very fragile palladium and platinum bulk-glass formers. An inverse correlation between glass-forming ability and fragility is identified, suggesting that iron-based glasses are effectively “kinetically” stabilized. |
| Databáze: | OpenAIRE |
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