The present study is an overview of the surface properties of liquid Al-Ni alloys, which are of great importance for the design and development of new Al-Ni and Ni-based industrial alloys, widely used as functional and structural materials. The solidification and thus, the microstructural evolution are directly dependent on the interface/surface properties of metallic melts. Therefore, numerical simulation of microstructure evolution requires reliable property data as input to such models. Taking into account the experimental difficulties related to a high reactivity of liquid Al-Ni alloys and the effects of impurities on their surface properties, the surface tension over the whole concentration range has been determined in the frameworks of three international research projects. Namely, the surface tension measurements have been carried out by both traditional container-based and as an alternative, containerless methods within the ESA-MAP ThermoProp and ESA-MAP Thermolab Projects and also under the EU FP6-IMPRESS Project. The obtained datasets were analysed and subsequently compared with the model predicted values as well as with the literature data. A strong exothermic mixing characterises the Al-Ni system and the presence of a few intermetallic compounds in the solid state leads to the formation of short range ordered elements or complexes in the liquid phase, at least near the melting temperature, which significantly affects the surface properties of alloy melts. Aiming to estimate the effects of short range ordering on these properties, the Compound Formation Model (CFM) and the Quasi Chemical Approximation (QCA) for regular solution were applied.

本研究概述了液态Al-Ni合金的表面性能，这对于被广泛用作功能和结构材料的新型Al-Ni和Ni基工业合金的设计和开发非常重要。凝固以及因此的微观结构演变直接取决于金属熔体的界面/表面特性。因此，微观结构演化的数值模拟需要可靠的属性数据作为此类模型的输入。考虑到与液态Al-Ni合金的高反应性相关的实验困难以及杂质对其表面性能的影响，在三个国际研究项目的框架内确定了整个浓度范围内的表面张力。即 在ESA-MAP ThermoProp和ESA-MAP Thermolab项目以及欧盟FP6-IMPRESS项目下，传统的基于容器的方法以及作为替代方法的无容器方法均进行了表面张力测量。对获得的数据集进行分析，然后与模型预测值以及文献数据进行比较。强烈的放热混合是Al-Ni系统的特征，并且固态中少量金属间化合物的存在会导致液相中至少在熔化温度附近形成短程有序元素或络合物，这会显着影响表面合金熔体的性能。旨在估算短程排序对这些属性的影响，