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A petal-like icosahedral quasicrystal with five branches,which is considered to be the representative morphology of the icosahedral quasicrystal,has been observed in the Y-rich Mg-Zn-Y ternary alloys. Moreover,the polygon-like mor-phology,another pattern of the icosahedral quasicrystal,has also been found in the Y-rich Mg-Zn-Y ternary alloys. The latter morphology results from the evolution of the former one. The growth mechanism of the petal-like morphology of the ico-sahedral quasicrystal was also discussed. Alloying composition,i.e.,Y element content,is a major factor inducing the mor-phology evolution of the icosahedral quasicrystal.
A petal-like icosahedral quasicrystal with five branches, which is considered to be the representative morphology of the icosahedral quasicrystal, has been observed in the Y-rich Mg-Zn-Y ternary alloys. Moreover, the polygon-like mor-phology, another pattern of the icosahedral quasicrystal, has also been found in the Y-rich Mg-Zn-Y ternary alloys. The latter morphology results from the evolution of the former one. The growth mechanism of the petal-like morphology of the ico-sahedral quasicrystal was also discussed. Alloying composition, ie, Y element content, is a major factor inducing the mor-phology evolution of the icosahedral quasicrystal.