Temperature dependence of the chemical short-range order in undercooled and stable Al-Fe-Co liquids
Temperature dependence of the chemical short-range order in undercooled and stable Al-Fe-Co liquids
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DOI：
10.1209/epl/i2003-10062-x
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发表时间：
2004
期刊：
影响因子：
1.8
通讯作者：
T. Schenk;V. Simonet;D. Holland-Moritz;R. Bellissent;T. Hansen;P. Convert;D. Herlach
中科院分区：
文献类型：
--
作者：
T. Schenk;V. Simonet;D. Holland-Moritz;R. Bellissent;T. Hansen;P. Convert;D. Herlach
用中子散射方法研究了稳定和过冷金属液态合金中化学短程有序的温度依赖性。这些实验是在Al-Fe-Co形成多四面体相的液体上进行的，有利于液体中普遍存在的二十面体拓扑短程有序。二十面体短程有序伴随着强烈的化学有序，使得过渡金属原子的第一配位壳层优先由Al原子组成。温度的降低导致了化学短程有序的增强。
The temperature dependence of the chemical short-range order is investigated by neutron scattering in stable and undercooled metallic liquid alloys. The experiments were performed on Al-Fe-Co liquids forming polytetrahedral phases and are in favour of an icosahedral topological short-range order prevailing in the liquids. The icosahedral short-range order is accompanied by a strong chemical order such that the first coordination shell of a transition metal atom consists preferentially of Al atoms. A decrease of temperature leads to an enhancement of the chemical short-range order.