Surface tension of liquid Al–Cu binary alloys
Surface tension of liquid Al–Cu binary alloys
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DOI：
10.3139/146.110221
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发表时间：
2009-11
影响因子：
0.8
通讯作者：
J. Schmitz;J. Brillo;I. Egry;R. Schmid-Fetzer
中科院分区：
文献类型：
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作者：
J. Schmitz;J. Brillo;I. Egry;R. Schmid-Fetzer
摘要采用电磁悬浮技术对液态Al-Cu二元合金的表面张力进行了接触式测量。数字CMOS照相机（400 fps）记录振荡液体样品的图像序列，并且从频谱分析确定表面张力。对覆盖整个组成范围的样品进行测量，并在宽温度范围内获得精确数据。结果表明，表面张力与温度呈负斜率线性关系。此外，它们随着铝浓度的增加而单调下降。所观察到的行为相对于温度和浓度与热力学模型计算使用的亚正规溶液近似。
Abstract Surface tension data of liquid Al–Cu binary alloys have been measured contactlessly using the technique of electromagnetic levitation. A digital CMOS-camera (400 fps) recorded image sequences of the oscillating liquid sample and surface tensions were determined from analysis of the frequency spectra. Measurements were performed for samples covering the entire range of composition and precise data were obtained in a broad temperature range. It was found that the surface tensions can be described as linear functions of temperature with a negative slope. Moreover, they monotonically decrease with an increase in the aluminium concentration. The observed behaviour with respect to both temperature and concentration is in agreement with thermodynamic model calculations using the subregular solution approximation.