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Nucleation behavior of Al–Mn icosahedral phase

Published online by Cambridge University Press:  31 January 2011

L.A. Bendersky  and
S.D. Ridder
L.A. Bendersky
Affiliation:
Metallurgy Division, National Bureau of Standards, Gaithersburg, Maryland 20899
S.D. Ridder
Affiliation:
Metallurgy Division, National Bureau of Standards, Gaithersburg, Maryland 20899
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Abstract

Electrohydrodynamic (EHD) atomization has been used to rapidly solidify micron and submicron size droplets of Al-14 at. % Mn to study nucleation behavior of icosahedral phase. Icosahedral grain size has been found to decrease continuously with decreasing droplet size. Based on this result, formation of the icosahedral phase is explained by homogeneous nucleation. Extremely low resistance to nucleation of icosahedral phase can be understood if possible topological similarities between liquid and icosahedral quasicrystal are considered. Formation of glass as configurationally frozen liquid in Al-Mn and similar alloy systems is questionable, implying that the reported Al-Mn glass probably has a microquasicrystalline structure.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 3 , June 1986 , pp. 405 - 414
Copyright
Copyright © Materials Research Society 1986

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