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AlCoCrCuFeNi-Based High-Entropy Alloys: Correlation Between Molar Density and Enthalpy of Mixing in the Liquid State

Plevachuk, Y. and Brillo, J. and Yakymovych, Andriy (2018) AlCoCrCuFeNi-Based High-Entropy Alloys: Correlation Between Molar Density and Enthalpy of Mixing in the Liquid State. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science. Springer. doi: 10.1007/s11661-018-4925-4. ISSN 1073-5623.

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Official URL: https://rdcu.be/7GF5

Abstract

The density of the liquid equiatomic high-entropy alloys, namely, AlCoCrCuFeNi, AlCoCuFeNi, and CrCoCuFeNi, as well as quaternary alloys AlCoCuFe and AlCoCrNi was determined over a wide temperature range. The measurements were performed by a non-contact technique combining electromagnetic levitation and optical dilatometry. The temperature and composition dependencies of the density were analyzed and the molar excess volumes were calculated. The integral enthalpy of mixing of multi-component alloys was predicted using extended Kohler model, while the model of Miedema was used for binary sub-system alloys. It has been found that a negative excess volume of the investigated Al-containing liquid alloys correlates with a negative enthalpy of mixing. In contrast, a positive excess volume and an endothermic reaction have been estimated for the liquid CoCrCuFeNi alloy. The change of the excess volume in the Al-containing liquid alloys is affected by two basic effects, namely, compression of the Al matrix and formation of compounds in the melt.

Item URL in elib:https://elib.dlr.de/121846/
Document Type:Article
Title:AlCoCrCuFeNi-Based High-Entropy Alloys: Correlation Between Molar Density and Enthalpy of Mixing in the Liquid State
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Plevachuk, Y.Ivan Franko National University, Lviv, UkraineUNSPECIFIED
Brillo, J.DLR-MPUNSPECIFIED
Yakymovych, AndriyUni WienUNSPECIFIED
Date:24 September 2018
Journal or Publication Title:Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1007/s11661-018-4925-4
Publisher:Springer
ISSN:1073-5623
Status:Published
Keywords:High entropy alloys Density Liquid alloys
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 - Project EML
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Brillo, Dr.rer.nat. Jürgen
Deposited On:01 Oct 2018 09:05
Last Modified:06 Sep 2019 15:21

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