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Thermodynamic and microscopic structure of liquid Cu-Sn alloys

机译:液态Cu-Sn合金的热力学和微观结构

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摘要

The observed asymmetry in the properties of mixing of Cu-Sn alloy in molten state is successfully explained on the basis of regular associated solution model. We have determined the free energy of mixing, heat of mixing, entropy of mixing, activity, concentration fluctuations in long wavelength limit S-CC(0) and the Warren Crowley short-range parameter alpha(1) of Cu-Sn alloys in molten state at 1400 K. The analysis suggests that heterocoordination leading to the formation of complex Cu3Sn is likely to exist in the liquid but is of a weakly interacting nature. The theoretical analysis reveals that the pairwise interaction energies between the species depend considerably on temperature and the alloy is more ordered towards Cu-rich region. Most of the thermodynamic parameters are found to be in good agreement with experimental values.
机译:在常规关联溶液模型的基础上,成功地解释了Cu-Sn合金在熔融状态下混合特性中观察到的不对称性。我们确定了混合自由能,混合热,混合熵,活度,长波长极限S-CC(0)中的浓度波动以及熔融状态下Cu-Sn合金的Warren Crowley短程参数alpha(1)状态在1400K。分析表明,杂配导致形成复杂的Cu3Sn可能存在于液体中,但具有弱相互作用的性质。理论分析表明,物种之间的成对相互作用能很大程度上取决于温度,并且合金向富铜区域更有序。发现大多数热力学参数与实验值非常吻合。

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