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Published October 17, 2011 | Published
Journal Article Open

Fragility of iron-based glasses


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.

Additional Information

© 2011 American Institute of Physics. Received 20 June 2011; accepted 12 September 2011; published online 17 October 2011. This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government [NRF-2009-352-D00125] and by the MRSEC Program of the National Science Foundation [DMR-0520565].

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Published - Na2011p16416Appl_Phys_Lett.pdf


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