Thermophysical Properties of Al-Si-Mg-Cu melts

Al-Si-Mg-Cu熔体的热物理性能

• 批准号: 138342114
• 负责人: Privatdozent Dr. Jürgen Brillo
• 金额: --
• 依托单位: Institut für Materialphysik im Weltraum
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/138342114?language=en
• 关键词: Thermophysical; Properties; Al; Si; Mg

In this project, thermophysical properties, relevant for understanding and quantitatively predicting solidification, are to be determined experimentally for the Al-Si-Mg-Cu alloy system. These properties are density, viscosity, and surface tension of the liquid phase. They will be measured as a function of temperature and composition to an accuracy better than 5% and linked to thermodynamic potentials by applying existing models or by developing new, appropriate ones. Special attention will be paid to the determination of excess quantities which are of paramount importance, in order to ensure the predictive power of the derived data sets. To provide for the highest possible accuracy of the measured data, containerless methods using electromagnetic levitation will be employed for the measurement of density and surface tension. For viscosity measurements, a newly built oscillating cup viscometer will be used. A link between thermophysical and thermodynamic data can be established through different models, e.g. Butler’s equation for the surface tension, or Kaptay’s theory for the viscosity. This way, the loop between thermodynamic calculations, using a CALPHAD-type approach, and thermophysical property data can be closed, enabling an iterative optimization of the data.

在本项目中，将通过实验确定Al-Si-Mg-Cu合金系统的热物理性质，这些性质与理解和定量预测凝固有关。这些性质是液体的密度、粘度和表面张力。它们将作为温度和组成的函数进行测量，精确度优于5%，并通过应用现有模型或开发新的适当模型与热力学势联系起来。将特别注意确定最重要的超额数量，以确保派生数据集的预测能力。为了提供尽可能高的测量数据的准确性，将采用使用电磁悬浮的无容器方法来测量密度和表面张力。对于粘度测量，将使用新制造的振荡杯粘度计。热物性数据和热力学数据之间的联系可以通过不同的模型来建立，例如表面张力的Butler方程或粘度的Kaptay理论。这样，使用CALPHAD类型方法的热力学计算和热物性数据之间的循环可以闭合，从而实现数据的迭代优化。

项目成果

Surface tension of binary Al–Si liquid alloys

二元 AlâSi 液态合金的表面张力

• DOI: 10.1007/s10853-015-8883-6
• 发表时间: 2015
• 期刊: Journal of Materials Science
• 影响因子: 4.5
• 作者: H. Kobatake;J. Brillo;J. Schmitz;P.-Y. Pichon
• 通讯作者: P.-Y. Pichon

Density and viscosity of ternary Al–Cu–Si liquid alloys

• DOI: 10.1007/s10853-014-8072-z
• 发表时间: 2013-06
• 期刊: Journal of Materials Science
• 影响因子: 4.5
• 作者: H. Kobatake;J. Schmitz;J. Brillo