High-temperature stability and faceting of the icosahedral Al—Fe—Cu phase
- 1 February 1990
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 61 (2) , 55-62
- https://doi.org/10.1080/09500839008206480
Abstract
Thin fragments of dodecahedral particles, extracted from an as-cast Al65Fe15Cu20 alloy ingot, have been studied by transmission electron microscopy. The as-cast state is not icosahedral but trigonal and exhibits a microstructure such that the overall symmetry is pesudo-icosahedral; annealed within the microscope, this microcrystalline state transforms homogeneously into the icosahedral phase, stable until its melting point. During this second transformation (surface melting or sublimation), faceted holes of a dodecahedra] shape were observed to develop within the quasicrystalline phase.Keywords
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