Title
Nanostructuration of i-Al64Cu23Fe13 quasicrystals produced by arc-furnace
Date Issued
01 November 2011
Access level
metadata only access
Resource Type
journal article
Author(s)
de Sousa M.A.
Pelegrini F.
Taquire M.
Baggio-Saitovitch E.M.
Abstract
The Al46Cu23Fe13 quasicrystal phase, prepared by arc-melting and nanostructured using high energy ball milling technique, was studied employing X-ray diffraction, transmission electron microscopy, ferromagnetic resonance and electric transport measurements. Fe local environments were studied by Mössbauer spectroscopy. The resistivity ratio R(4.2 K)/R(300 K) is within the expected values commonly observed in an icosahedral phase. In general, the experimental results show that an appropriate heat treatment of the as-cast alloy prepared by arc-melting makes possible to obtain good quasicrystal samples. On the other hand, for milling time longer than five hours, the average grain-size of quasicrystal phase reduces, but it preserves Fe local atomic orders. It is also observed that the quasicrystalline sample decomposes in an iron rich nano-quasicrystalline phase and a ε-Al2Cu3 phase. Electric transport measurements show that at low temperatures the nano-quasicrystalline samples behave strongly different to their solid counterparts, an effect attributed to a long-range order reduction and an increasing of grain boundary regions. The presence of local magnetic moments in the nanostructured sample is also discussed. © 2011 Springer Science+Business Media B.V.
Start page
1
End page
8
Volume
203
Issue
March 1
Language
English
OCDE Knowledge area
Nano-materiales
Física de partículas, Campos de la Física
Subjects
Scopus EID
2-s2.0-80051861548
Source
Hyperfine Interactions
ISSN of the container
03043843
Sources of information:
Directorio de Producción Científica
Scopus