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X-ray photoelectron spectroscopic studies on nanoquasicrystalline powders of Al70Cu20Fe10 obtained by mechanical alloying

Published online by Cambridge University Press:  31 January 2011

P. Barua ,
V. Srinivas ,
S. Dhabal  and
T. B. Ghosh
P. Barua
Affiliation:
Department of Physics & Meteorology, Indian Institute of Technology, Kharagpur 721302, India
V. Srinivas
Affiliation:
Department of Physics & Meteorology, Indian Institute of Technology, Kharagpur 721302, India
S. Dhabal
Affiliation:
Department of Physics & Meteorology, Indian Institute of Technology, Kharagpur 721302, India
T. B. Ghosh*
Affiliation:
Department of Physics & Meteorology, Indian Institute of Technology, Kharagpur 721302, India
*
a)Address all correspondence to this author.timir@phy.iitkgp.ernet.in
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Abstract

Surface chemical properties of nanoguasicrystalline powders of Al–Cu–Fe synthesized by the ball-milling technique have been investigated using x-ray photoelectron spectroscopy (XPS). The samples were exposed to ambient conditions at room temperature as well as higher temperatures. Our XPS results reveal that the surfaces of nanopowders of Al70Cu20Fe10 are coated with an Al2O3 layer within which the quasicrystalline phase resides. It also appears that the thickness of this layer does not increase significantly on either heating below 873 K or prolonged exposure to ambient conditions.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 17 , Issue 8 , August 2002 , pp. 1892 - 1895
Copyright
Copyright © Materials Research Society 2002

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