Anisotropy of the solid liquid interface and its effect on heterogeneous nucleation in aluminium-based melts

铝基熔体固液界面各向异性及其对异相成核的影响

• 批准号: 51421667
• 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: Priority Programmes
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/51421667?language=en
• 关键词: Anisotropy; solid; liquid; interface; its

For modelling and understanding of heterogeneous nucleation processes, the precise knowledge of the involved interfacial energies is essential. In particular, the solid-liquid interfacial energy, which describes the interaction of a melt with a solid, is of great importance. Generally, it strongly depends on the crystallographic orientation of the substrate. It is the goal of this project to study this anisotropy of liquid Al-Ni and Cu-Ni alloys being in contact with solid inert non-metallic or non-inert metallic single crystalline substrates. The interfacial energies will be measured by means of the sessile drop method as a function of temperature, alloy composition, and crystallographic orientation. Our results will be discussed in terms of thermodynamic model calculations. They are not only the experimental basis for the verification of Monte Carlo- and Molecular Dynamics simulations, they will also be compared with corresponding results of phase field simulations.

对于非均质成核过程的建模和理解，所涉及的界面能的精确知识是必不可少的。特别是，描述熔体与固体相互作用的固-液界面能非常重要。通常，它强烈地依赖于衬底的晶体取向。本项目的目标是研究液态Al-Ni和Cu-Ni合金与固态惰性非金属或非惰性金属单晶基底接触时的各向异性。界面能将通过座滴法作为温度、合金成分和晶体取向的函数进行测量。我们的研究结果将在热力学模型计算方面进行讨论。它们不仅是蒙特卡罗和分子动力学模拟验证的实验基础，还将与相场模拟的相应结果进行比较。