Abstract
For the first time, the short-range order of deeply undercooled liquids of alloys forming quasicrystalline and polytetrahedral phases (Al 13Fe 4 and Al 74Co 26) is investigated by combining the containerless processing technique of electromagnetic levitation with elastic neutron scattering. The experimentally determined structure factor, S( Q), was simulated by assuming that clusters with different structures exist in the liquid. The best fit of the experimental data is obtained under the assumption of an icosahedral short-range order. This supports the nearly 50 year-old prediction of Frank that an icosahedral short-range order prevails in undercooled metallic liquids.
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