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Synergistic stabilization of metastable Fe23B6 and gamma-Fe in undercooled Fe83B17

TitleSynergistic stabilization of metastable Fe23B6 and gamma-Fe in undercooled Fe83B17
Publication TypeJournal Article
Year of Publication2015
AuthorsQuirinale, DG, Rustan, GE, Kreyssig, A, Goldman, AI
JournalApplied Physics Letters
Date Published06
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000356618700017
Keywordsab-initio, amorphous-alloys, antiferromagnetism, co, cu, diffraction, iron, metallic glasses, ni, solidification

Previous investigations of undercooled liquid Fe83B17 near the eutectic composition have found that metastable crystalline phases, such as Fe23B6, can be formed and persist down to ambient temperature even for rather modest cooling rates. Using time-resolved high-energy x-ray diffraction on electrostatically levitated samples of Fe83B17, we demonstrate that the Fe23B6 metastable phase and fcc gamma-Fe grow coherently from the undercooled Fe83B17 liquid and effectively suppress the formation of the equilibrium Fe2B+bcc alpha-Fe phases. The stabilization of gamma-Fe offers another opportunity for experimental investigations of magnetism in metastable fcc iron. (C) 2015 AIP Publishing LLC.

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