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Synthesis of Bulk Quasicrystals by Spark Plasma Sintering

Published online by Cambridge University Press:  17 March 2011

E. Fleury ,
J.H. Lee ,
S.H. Kim ,
G.S. Song ,
J.S. Kim ,
W.T. Kim  and
D.H. Kim
E. Fleury
Affiliation:
Yonsei University, Center for Noncrystalline Materials, Department of Metallurgical Engineering, Seoul, Korea
J.H. Lee
Affiliation:
Asan Medical Center, Department of Biomedical Engineering, Seoul, Korea
S.H. Kim
Affiliation:
Yonsei University, Center for Noncrystalline Materials, Department of Metallurgical Engineering, Seoul, Korea
G.S. Song
Affiliation:
Yonsei University, Center for Noncrystalline Materials, Department of Metallurgical Engineering, Seoul, Korea
J.S. Kim
Affiliation:
Ulsan University, Department of Materials Science and Engineering, Ulsan, Korea
W.T. Kim
Affiliation:
Chongju University, Department of Physics, Chongju, Korea
D.H. Kim
Affiliation:
Yonsei University, Center for Noncrystalline Materials, Department of Metallurgical Engineering, Seoul, Korea
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Abstract

Spark plasma sintering method was applied to Al-Cu-Fe and Al-Si-Cu-Fe gas-atomized powders to prepare almost pore-free cylindrical specimens with icosahedral and 1/1 cubic approximant phases, respectively. This investigation has revealed that a high density could be obtained despite the short period and low temperature imposed during spark plasma sintering. In comparison to hot press technique, these conditions are favorable since they limit the formation of secondary phases and avoid exaggerated grain growth. The Vickers microhardness and fracture toughness of these two alloy systems were found to be larger than those obtained from cast and hot pressed samples, which could be attributed to a strong bonding between powder particles and the small-grained microstructure of the bulk SPS quasicrystalline specimens.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 643: Symposium K – Quasicrystals-Preparation, Properties, and Applications , 2000 , K2.1
Copyright
Copyright © Materials Research Society 2001

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