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Aluminum-Based Quasicrystals Studied by Slow Positron Beam Technique

Published online by Cambridge University Press:  17 March 2011

K. Sato ,
H. Uchiyama ,
I. Kanazawa ,
R. Tamura ,
K. Kimura ,
F. Komori ,
R. Suzuki ,
T. Ohdaira  and
S. Takeuchi
K. Sato
Affiliation:
Department of Physics, Tokyo Gakugei University, Koganei, Tokyo, Japan
H. Uchiyama
Affiliation:
Department of Physics, Tokyo Gakugei University, Koganei, Tokyo, Japan
I. Kanazawa
Affiliation:
Department of Physics, Tokyo Gakugei University, Koganei, Tokyo, Japan
R. Tamura
Affiliation:
Department of Materials Sciences, The University of Tokyo, Hongo, Bunkyo, Tokyo, Japan
K. Kimura
Affiliation:
Department of Materials Sciences, The University of Tokyo, Hongo, Bunkyo, Tokyo, Japan
F. Komori
Affiliation:
Institute for Solid State Physics, The University of Tokyo, Roppomgi, Minato, Tokyo, Japan
R. Suzuki
Affiliation:
Quantum Radiation Division, Electrotechnical Laboratory, Umezono, Tsukuba, Ibaraki, Japan
T. Ohdaira
Affiliation:
Quantum Radiation Division, Electrotechnical Laboratory, Umezono, Tsukuba, Ibaraki, Japan
S. Takeuchi
Affiliation:
Department of Materials Science and Technology, Science University of Tokyo, Noda, Chiba, Japan
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Abstract

Icosahedral quasicrystals Al71.5Pd20.3Mn8.2, Al70.7Pd21.34Re7.96, Al62.5Cu25.5Fe12.5, and α-Al68.31Mn21.21Si10.48 1/1- approximant were investigated by using a monoenergetic slow positron beam. The structural vacancy densities in the first three samples were determined to be 5.0×1020, 7.7×1020, and 4.7×1020 cm−3, respectively, by analyzing the measured S-parameter.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 643: Symposium K – Quasicrystals-Preparation, Properties, and Applications , 2000 , K9.10
Copyright
Copyright © Materials Research Society 2001

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