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Atomic structure of amorphous Al90FexCe10−x

Published online by Cambridge University Press:  31 January 2011

H. Y. Hsieh ,
B. H. Toby ,
T. Egami ,
Y. He ,
S. J. Poon  and
G. J. Shiflet
H. Y. Hsieh
Affiliation:
Department of Electrical Engineering, The University of Pennsylvania, Philadelphia, Pennsylvania 19104-6314
B. H. Toby
Affiliation:
Department of Materials Science and Engineering, The University of Pennsylvania, Philadelphia, Pennsylvania 19104-6272
T. Egami
Affiliation:
Department of Materials Science and Engineering, The University of Pennsylvania, Philadelphia, Pennsylvania 19104-6272
Y. He
Affiliation:
Department of Physics, The University of Virginia, Charlottesville, Virginia 22901
S. J. Poon
Affiliation:
Department of Physics, The University of Virginia, Charlottesville, Virginia 22901
G. J. Shiflet
Affiliation:
Department of Materials Science, University of Virginia, Charlottesville, Virginia 22901
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Abstract

The atomic structure of liquid-quenched amorphous Al90FexCe10−x (x = 5,7) was studied by pulsed neutron and x-ray scattering. The atomic pair-density function determined by pulsed neutron diffraction indicates that a significant portion of Al–Fe distances is anomalously short, while some part of the Al–Al distances is anomalously long. Both neutron and x-ray scattering showed the presence of a prepeak in the structure factor. These results suggest that a strong interaction between A1 and Fe modifies the structure of this glass, leading to chemical and topological short-range ordering.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 12 , December 1990 , pp. 2807 - 2812
Copyright
Copyright © Materials Research Society 1990

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