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Surface tension of liquid Ti with adsorbed oxygen and its prediction

Brillo, Jürgen and Wessing, Johanna and Kobatake, Hidekazu and Fukuyama, Hiroyuki (2019) Surface tension of liquid Ti with adsorbed oxygen and its prediction. Journal of Molecular Liquids, 290, 111226 1-111226 12. Elsevier. doi: 10.1016/j.molliq.2019.111226. ISSN 0167-7322.

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Surface tensions of electromagnetically levitated liquid Ti-samples were measured under the influence of oxygen. The partial pressure of oxygen is controlled by means of yttria-stabilized zirconia tubes as well as Ar/H2/H2O buffer gas mixtures. In addition, Ti-O samples were prepared by adding different amounts of TiO2 powder to pure Ti. No significant dependence of the surface tension on the applied oxygen partial pressure was found for the samples processed. However, the surface tension was found to strongly depend on the bulk oxygen mole fraction determined by chemical analysis. From some experiments a small time dependence of the surface tension became evident. The observed dependencies of the surface tension on oxygen mole fraction as well as on time could be described by the model developed in the present work. It is based on adsorption/desorption rate equations and the surface tension is calculated from the ideal Butler equation. Non-ideal interactions between oxygen and titanium are taken into account. It is generally observed that, due to the strong attractive interaction between Ti and oxygen, the surface tension of Ti is much less sensitive to the presence of oxygen than the surface tension of other metallic systems.

Item URL in elib:https://elib.dlr.de/128273/
Document Type:Article
Title:Surface tension of liquid Ti with adsorbed oxygen and its prediction
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Brillo, JürgenJuergen.Brillo (at) dlr.deUNSPECIFIED
Wessing, JohannaJohanna.Wessing (at) dlr.deUNSPECIFIED
Kobatake, HidekazuHidekazu.Kobatake (at) dlr.deUNSPECIFIED
Fukuyama, Hiroyukihiroyuki.fukuyama.b6 (at) tohoku.ac.jpUNSPECIFIED
Date:21 June 2019
Journal or Publication Title:Journal of Molecular Liquids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.molliq.2019.111226
Page Range:111226 1-111226 12
Keywords:Electromagnetic levitation Liquid titanium Modelling Oxygen Surface tension
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:08 Jul 2019 07:03
Last Modified:06 Sep 2019 15:19

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