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

Abstract:

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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:

Edited by:

Dongye Sun, Wen-Pei Sung and Ran Chen

Pages:

822-825

DOI:

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

Citation:

M. Zhu et al., "Characterization of the Icosahedral Quasicrystal in the Rapidly Solidified Mg-Al-Zn Ternary Alloy", Applied Mechanics and Materials, Vols. 71-78, pp. 822-825, 2011

Online since:

July 2011

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$35.00

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