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Search and Synthesis of New Family of Quasicrystals
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Description
<jats:title>ABSTRACT</jats:title><jats:p>Starting from the Zn<jats:sub>17</jats:sub>Sc<jats:sub>3</jats:sub> cubic approximant, new icosahedral quasicrystal was searched by substituting Zn by other metals, M, at the alloy composition of Zn<jats:sub>75</jats:sub>M<jats:sub>10</jats:sub>Sc<jats:sub>15</jats:sub>. In the cases of M = Mn, Fe, Co, Ni, Pd, Pt, Ag and Au, new P-type quasicrystals were discovered in as-cast alloys. In the cases of M = Fe, Co, Ni, Pd and Ag, the quasicrystals are thermodynamically stable at approximately 700 °C. This result indicates that use of an approximant crystal as a starting material is very efficient way to search new quasicrystal alloy, and many kinds of metals stabilize the quasicrystal structures; <jats:italic>i.e.</jats:italic> noble metals and transition elements including Mn, Fe, Co and Ni in addition to Mg. Taking the variety in base metals of Tsai-type approximants into account, this variety in additional components suggests many possibilities of undiscovered quasicrystals. The equality ofthe electron concentration, <jats:italic>ela</jats:italic> ≈ 2.1, in Hume-Rothery rule may be a guide to these quasicrystals.</jats:p>
Journal
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- MRS Proceedings
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MRS Proceedings 805 2003-01-01
Springer Science and Business Media LLC
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Details 詳細情報について
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- CRID
- 1872835442500332288
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- ISSN
- 19464274
- 02729172
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- Data Source
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- OpenAIRE