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http://dx.doi.org/10.3740/MRSK.2011.21.3.168

Precipitation of Icosahedral Qusicrystal Phase in Mg-Zn-Y(ZW61) alloy  

Kwak, Ho-Yeon (Department of Nano Materials Engineering, Chungnam National university)
Lee, Kap-Ho (Department of Nano Materials Engineering, Chungnam National university)
Publication Information
Korean Journal of Materials Research / v.21, no.3, 2011 , pp. 168-173 More about this Journal
Abstract
Precipitation of the ordered icosahedral quasicrystal in Mg-6wt%Zn-1wt%Y alloy has been characterized by transmission electron microscopy observations. The lamellar-type icosahedral qusicrystal phases (I-phase) with the face-centered icosahedral (FCI) structure are observed in alloy after solution treatment at $550^{\circ}C$. In the alloy annealed at $400^{\circ}C$, polygon-shaped I-phases are observed in the ${\alpha}$-Mg matrix. The interfaces of the I-phase with the matrix are facetted and the facets are on five-fold and two- fold plane of the I-phase. The orientation relationship of the I-phase with the matrix is determined to be $[I5]_I//[001]_{Mg}$, $(2f)_I//(2\overline{1}0)_{Mg}$ and $[I2]_I//[311]_{Mg}$, $(5f)_I//(0\overline{1}1)_{Mg}$. The icosahedral grains are occasionally found to be twinned with one of the five-fold axis as the twin axis. The twin boundaries appear to be fairly straight and perpendicular to the fivefold twin axis. The icosahedral twin can be expressed as a rotation of $63.4^{\circ}$ or $116.62^{\circ}$ around two fold zone axis.
Keywords
Mg-Zn-Y alloy; $\underline{icosahedra\quasicrystal\phase}$; orientation relationship; twin structure; high resolution transmission electron microscopy;
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1 A. Niikura, A. P. Tsai, A. Inoue and T. masumoto, Phil. Mag. Lett., 69(6), 351 (1994).   DOI   ScienceOn
2 Z. P. Luo, S. Q. Zhang, Y. L. Tang and D. S. Zhao, Scripta Metall. Mater., 32, 1411 (1995).   DOI   ScienceOn
3 D. H. Bae, S. H. Kim, D. H. Kim and W. T. Kim, Acta Mater., 50, 2343 (2002).   DOI   ScienceOn
4 A. Singh, M. Nakamura, M. Watanabe, A. Kato and A. P. Tsai, Scripta Mater., 49, 417 (2003).   DOI   ScienceOn
5 W. J. Kim, S. I. Hong and K. H. Lee, Metals and Materials Int., 16, 171 (2010).   DOI   ScienceOn
6 F. S. Pierce, S. J. Poon and Q. Guo, Seience, 261, 737 (1993).   DOI   ScienceOn
7 Z. Luo, S. Zhang, Y. Tang and D. Zhao, Scripta Metall. Mater., 28, 1513 (1993).   DOI
8 Z. P. Luo, S. Q. Zhang, Y. L. Tang and D. S. Zhao, Scripta Metall. Mater., 32, 1411 (1995).   DOI   ScienceOn
9 S. Ebalard and F. Spaepen, J. Mater. Res., 4, 39 (1989).   DOI
10 S. Y. Baek, K. H. Lee and T. S. Kim, Kor. J. Mater. Res., 18(7), 362 (2008) (in Korean).   DOI   ScienceOn
11 A. Singh, A. P. Tsai, M. Nakamura, M. Watanabe and A. Kato, Phil. Mag. Lett., 83(9), 543 (2003).   DOI   ScienceOn
12 A. Singh, M. Watanabe, A. Kato and A. P. Tsai, Mater. Sci. Eng., A397, 22 (2005).
13 A. Singh, M. Watanabe, A. Kato and A. P. Tsai, Acta Mater., 53, 4733 (2005).   DOI   ScienceOn
14 D. Shechtman, I. Blech, D. Garatias, J. W. Cahn, Phys. Rev. Lett., 53, 1951 (1984).   DOI
15 V. Elser, Phys. Rev., B32, 4892 (1985).
16 J. W. Cahn, D. Shechtman and D. Gratias, J. Mater. Res., 1, 13 (1986).   DOI
17 K. Hiraga, J. Electron Microsc., 40, 81 (1991).
18 J. F. Nie, Scripta Mater., 48, 1009 (2003).   DOI   ScienceOn
19 I. J. Kim, D. H. Bae and D. H. Kim, Mater. Sci. Eng., A359, 313 (2003).
20 M. X. Zang and P. M. Kelly, Scripta Mater., 48, 379 (2003).   DOI   ScienceOn