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首页> 外文期刊>Chemical Physics Letters >Interfacial and bulk oscillatory instabilities in a binary fluid metal: the example of a Ga-Pb alloy
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Interfacial and bulk oscillatory instabilities in a binary fluid metal: the example of a Ga-Pb alloy

机译：二元流体金属中的界面和整体振动不稳定性：Ga-Pb合金的示例

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摘要

First observations of an unusual oscillatory instability in a binary metallic fluid exhibiting liquid-liquid phase separation are reported. For this aim, the liquid/vapour interface of the Ga0.95Pb0.05 alloy has been studied by a surface sensitive optical second harmonic generation (SHG) probe over a wide temperature range (465-313 degreesC) at conditions above and inside the miscibility gap. Regular oscillations of the SHG intensities with a period of similar to40 min are found, which correlate strongly with temperature oscillations of the bulk fluid with amplitudes of similar to5-8 K. It is shown that these oscillations are driven by wetting and dewetting characteristics at the interface during phase separation via a periodic variation of the interfacial emissivities. A qualitative explanation of the surface induced bulk instabilities is presented. (C) 2004 Elsevier B.V. All rights reserved. [References: 21]
机译：首次观察到在表现出液-液相分离的二元金属流体中出现异常振荡不稳定的现象。为了这个目的，Ga0.95Pb0.05合金的液体/蒸气界面已经通过表面敏感的光学二次谐波（SHG）探针在较宽的温度范围（465-313℃）内和混溶条件下进行了研究。间隙。发现SHG强度的规律性振荡具有类似于40分钟的周期，其与振幅近似于5-8 K的散装流体的温度振荡密切相关。研究表明，这些振荡是由湿润和去湿特性驱动的。通过界面发射率的周期性变化在相分离过程中形成界面。给出了表面诱导的体积不稳定性的定性解释。 （C）2004 Elsevier B.V.保留所有权利。 [参考：21]

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