Characterization of the Icosahedral Quasicrystal in the Rapidly Solidified Mg-Al-Zn Ternary Alloy

Man Zhu; Zeng Yun Jian; Cui Xia Liu; Gen Cang Yang; Yao He Zhou

doi:10.4028/www.scientific.net/AMM.71-78.822

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 71-78Characterization of the Icosahedral Quasicrystal...

Characterization of the Icosahedral Quasicrystal in the Rapidly Solidified Mg-Al-Zn Ternary Alloy

Abstract:

By means of XRD, SEM, FE-SEM, and TEM, the microstructures and growth morphology features of icosahedral quasicrystal for rapidly solidified Mg-Al-Zn system were investigated. It was found that, single icosahedral quasicrystal can be obtained in the Mg-Al-Zn alloys. The icosahedral quasicrystal reveals three typical morphologies: well developed dendrites, coral-like, and petal-like, and its compositions are in a wide range composition with 42.87-48.89 at.%Mg, 13.78-17.03 at.%Al, and 34.22-40.60 at.%Zn. Pentagonal dodecahedron with icosahedral symmetries is seen, and certain steps in pentagonal faces suggest that the planar growth occurs on the pentagonal faces.

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Periodical:

Applied Mechanics and Materials (Volumes 71-78)

Pages:

822-825

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.71-78.822

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Online since:

July 2011

Authors:

Man Zhu, Zeng Yun Jian, Cui Xia Liu, Gen Cang Yang, Yao He Zhou

Keywords:

Icosahedral Quasicrystal, Mg-Al-Zn, Pentagonal Dodecahedron, Rapid Solidification

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