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)
QUISPE MARCATOMA, JUSTINIANO
ROJAS AYALA, CHACHI
LANDAURO SAENZ, CARLOS VLADIMIR
de Sousa M.A.
Pelegrini F.
Taquire M.
PEÑA RODRIGUEZ, VICTOR ANTONIO
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
Scopus EID
2-s2.0-80051861548
Source
Hyperfine Interactions
ISSN of the container
03043843
Sources of information: Directorio de Producción Científica Scopus