Characterization of the Icosahedral Quasicrystal in the Rapidly Solidified Mg-Al-Zn Ternary Alloy
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.
Dongye Sun, Wen-Pei Sung and Ran Chen
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