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

Date

2016-12-15

Author

YILDIRIM, CİHAN
KUTSAL, M.
OTT, R. T.
BESSER, M. F.
KRAMER, M. J.
Kalay, Yunus Eren

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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.

Subject Keywords

Mechanical Engineering, General Materials Science, Mechanics of Materials

URI

https://hdl.handle.net/11511/40012

Collections

Department of Metallurgical and Materials Engineering, Article