Growth of large-grain R-Mg-Zn quasicrystals from the ternary melt (R = Y, Er, Ho, Dy and Tb)

I. R. Fisher Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA

Z. Islam Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA

A. F. Panchula Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA

K. O. Cheon Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA

M. J. Kramer Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa, 50011, USA

P. C. Canfield Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA

A. I. Goldman Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA

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Abstract

The growth of large (up to 0.5 cm³). single-grain R-Mg-Zn quasicrystals (R = Y, Er, Ho, Dy and Tb) from a ternary melt is described in detail. The quasicrystals grown by this technique have a composition R_8.7Mg_34.6Zn_56.8, are thermodynamically stable and have a dodecahedral morphology with clearly visible pentagonal facets. The quasicrystalline phase has been examined by X-ray diffaction, high-resolution transmission electron microscopy, elemental analysis and transport measurements. In addition, results are presented for a closely related ternary crystalline phase.

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Growth of large-grain R-Mg-Zn quasicrystals from the ternary melt (R = Y, Er, Ho, Dy and Tb)

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Growth of large-grain R-Mg-Zn quasicrystals from the ternary melt (R = Y, Er, Ho, Dy and Tb)

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