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Fragility of iron-based glasses

Na, Jong Hyun and Demetriou, Marios D. and Johnson, William L. (2011) Fragility of iron-based glasses. Applied Physics Letters, 99 (16). Art. No. 161902. ISSN 0003-6951.

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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.

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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].
Funding AgencyGrant Number
National Research Foundation of KoreaNRF-2009-352-D00125
NSF MRSEC ProgramDMR-0520565
Subject Keywords:bonds (chemical); glass transition; iron compounds; metallic glasses; palladium; platinum; viscosity; vitrification
Issue or Number:16
Classification Code:PACS:; 61.43.Fs; 66.20.-d
Record Number:CaltechAUTHORS:20111205-144418165
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28302
Deposited By: Tony Diaz
Deposited On:06 Dec 2011 23:08
Last Modified:03 Oct 2019 03:31

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