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The role of amorphous precursor in phase selection hierarchy in marginal metallic glasses

TitleThe role of amorphous precursor in phase selection hierarchy in marginal metallic glasses
Publication TypeJournal Article
Year of Publication2016
AuthorsYildirim, C, Kutsal, M, Ott, RT, Besser, M, Kramer, MJ, Kalay, YE
Journal Design
Volume112
Pagination479-484
Date Published12
Type of ArticleArticle
ISBN Number0264-1275
Accession NumberWOS:000387279700054
Keywordsalloys, crystallization, Marginal, Materials Science, Medium-range order, Metallic glass, nanocrystal development, nanocrystallization, Phase selection, temperature
Abstract

The solid state amorphous structure and devitrification products of Al90Tb10 alloys produced by Cu block meltspinning and magnetron sputtering were investigated by a combined study of differential scanning calorimetry, in-situ X-ray diffraction and conventional transmission electron microscopy. The as-prepared specimens were found to be fully amorphous according to the electron and X-ray diffraction. The thermal analysis and in-situ XRD analyses of the amorphous samples having the same chemistry but different processing history showed clear differences in the devitrification pathways in terms of nanocrystal population, size and the phase selection. The variations in the crystallization path were explained on the basis of distinct topological and chemical medium range ordering observed in as-quenched and as-sputtered amorphous structures. (C) 2016 Elsevier Ltd. All rights reserved.

DOI10.1016/j.matdes.2016.09.060
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Structures and Dynamics

Alternate JournalMater. Des.