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Surface Properties of Liquid Al-Ni Alloys: Experiments Vs Theory

Novakovic, Rada and Mohr, Markus and Giuranno, Donatella and Ricci, E. and Brillo, Jürgen and Wunderlich, R. and Egry, I. and Plevachuk, Y. and Fechter, Stefan (2020) Surface Properties of Liquid Al-Ni Alloys: Experiments Vs Theory. Microgravity Science and Technology. Springer. doi: 10.1007/s12217-020-09832-w. ISSN 0938-0108.

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Official URL: https://doi.org/10.1007/s12217-020-09832-w

Abstract

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.

Item URL in elib:https://elib.dlr.de/136318/
Document Type:Article
Title:Surface Properties of Liquid Al-Ni Alloys: Experiments Vs Theory
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Novakovic, RadaCNR/IENIUNSPECIFIED
Mohr, MarkusUni UlmUNSPECIFIED
Giuranno, DonatellaCNR-IENI Genova, ItalienUNSPECIFIED
Ricci, E.CNR-IENIUNSPECIFIED
Brillo, JürgenJuergen.Brillo (at) dlr.deUNSPECIFIED
Wunderlich, R.Ulm Universität, UlmUNSPECIFIED
Egry, I.Institut für Materialphysik im Weltraum, DLRUNSPECIFIED
Plevachuk, Y.Ivan Franko National University, Lviv, UkraineUNSPECIFIED
Fechter, StefanStefan.Fechter (at) dlr.deUNSPECIFIED
Date:2020
Journal or Publication Title:Microgravity Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1007/s12217-020-09832-w
Publisher:Springer
ISSN:0938-0108
Status:Published
Keywords:Al-Ni Surface tension Sessile/large drop methods Parabolic flight Electromagnetic levitation Thermodynamics and statistical mechanics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Brillo, Dr.rer.nat. Jürgen
Deposited On:06 Oct 2020 08:36
Last Modified:06 Oct 2020 08:36

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