High-temperature stability and faceting of the icosahedral Al—Fe—Cu phase
作者:
M. Audier,
P. Guyot,
Y. Brechet,
期刊:
Philosophical Magazine Letters
(Taylor Available online 1990)
卷期:
Volume 61,
issue 2
页码: 55-62
ISSN:0950-0839
年代: 1990
DOI:10.1080/09500839008206480
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Thin fragments of dodecahedral particles, extracted from an as-cast Al65Fe15Cu20alloy 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.
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