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Philosophical Magazine Volume 86, 2006 - Issue 3-5: Proceedings of the 9th International Conference on Quasicrystals, 22–26 May 2005, Part 1. Guest Editors: Cynthia J. Jenks, Daniel J. Sordelet and Patricia Thiel
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Original Articles

Heterogeneous nucleation of icosahedral phase from FCC phase in cast Al87Mn4Si2Be7 alloy

E. Fleury Advanced Metals Research Center, Korea Institute of Science and Technology, Cheongryang, Seoul 130-650, KoreaCorrespondence[email protected]
,
H.-J. Chang Center for Non-Crystalline Materials, Yonsei University, Seoul, Korea
&
D.-H. Kim Center for Non-Crystalline Materials, Yonsei University, Seoul, Korea
Pages 349-354 | Received 15 May 2005, Accepted 29 Jun 2005, Published online: 21 Aug 2006
 
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Abstract

The formation of the icosahedral (i) quasicrystalline phase has been studied in the cast Al87Mn4Si2Be7 alloy. Under low cooling rates, i-phase particles of about 5 to 15 µm formed in the αAl matrix. A thorough examination of the microstructure revealed the existence of cubic crystalline phases embedded in the i-particles. Microstructural and thermal analyses indicated that the i-particles nucleated heterogeneously from the cubic AlMn(Si)Be4 phases by a peritectic reaction, however with a slight misorientation.

Acknowledgements

D.H. Kim and H.J. Chang thank the Creative Research Initiatives of the Korean Ministry of Science and Technology for the financial support of this study.

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