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Enhancement of the Icosahedral Quasicrystalline Phase Forming Ability with Be Addition to an Al62.5Cu25.5Fe12 Alloy

Published online by Cambridge University Press:  17 March 2011

S.M. Lee ,
B.H. Kim ,
W.T. Kim  and
D.H. Kim
S.M. Lee
Affiliation:
Korea Institute of Industrial Technology, Inchon, Korea
B.H. Kim
Affiliation:
Yonsei University, Center for Noncrystalline Materials, Dept. of Metallurgical Engineering, Seoul, Korea
W.T. Kim
Affiliation:
Yonsei University, Center for Noncrystalline Materials, Dept. of Metallurgical Engineering, Seoul, Korea
D.H. Kim
Affiliation:
Yonsei University, Center for Noncrystalline Materials, Dept. of Metallurgical Engineering, Seoul, Korea
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Abstract

The quasicrystalline phase forming ability, solidification structure, thermal stability, and phase relationships of a series of conventionally-cast Al62-xCu25.5Fe12.5Bex (x=0,1,3,5,7) alloys were investigated. Single icosahedral quasicrystalline phase was successfully obtained by partial replacement of Al with Be (7 at.%) in an Al62Cu25.5Fe12.5 alloy during crucible cooling. The I-phase in an Al55Cu25.5Fe12.5Be7 alloy has the same face-centered icosahedral structure as that in an Al62Cu25.5Fe12.5 alloy, with less phason strain. Hardness of the I-phase increases with x, i.e. from Hv 710 for x=1 to Hv 809 for x=7.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 643: Symposium K – Quasicrystals-Preparation, Properties, and Applications , 2000 , K2.6
Copyright
Copyright © Materials Research Society 2001

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References

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