@inproceedings{d19d2f063e26472eaac61d3a37429f07,
title = "Phase transformations in Au-Fe particles and thin films: Size effects at the micro- and nano-scales",
abstract = "Thin Au-Fe bilayers (3-30 nm in total thickness) were deposited on sapphire substrates. Annealing in a temperature range of 600-1100°C resulted in solid-state dewetting and the subsequent formation of micro- and nano-particles. Electron microscopy, atomic force microscopy and in-situ X-ray diffraction were employed to systematically study two phase transformations in the Au-Fe system: (1) precipitation of α-Fe from supersaturated Au-Fe solidsolution particles; (2) α→γ transformation in Fe and Au-Fe thin films and particles. In both cases the transformations proceeded differently than in the bulk already for sub-micron (100 nm - 1 μm) particles. A {"}reverse size effect{"} was observed in thin Fe films. These results were explained by the low defect concentration in the particles, nucleation difficulties, slow diffusivity on facets, and Au segregation. The main conclusion is that phase transformations in the particles and in the bulk proceed differently not only for nano-sized particles as was customarily believed, but for particles of sub-micrometer size as well.",
keywords = "Au-Fe, Particles, Phase transformations, Size effect, Thin films",
author = "Dor Amram and Oleg Kovalenko and Leonid Klinger and Eugen Rabkin",
year = "2015",
language = "الإنجليزيّة",
series = "PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015",
pages = "147--154",
editor = "Long-Qing Chen and Matthias Militzer and Gianluigi Botton and James Howe and Chadwick Sinclair and Hatem Zurob",
booktitle = "PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015",
note = "International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015 ; Conference date: 28-06-2015 Through 03-07-2015",
}