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Thermophysical properties of liquid multicomponent alloys

Brillo, Jürgen and Egry, Ivan (2006) Thermophysical properties of liquid multicomponent alloys. 152nd ISIJ Meeting, September, 16-18, 2006, Niigata, Japan.

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Abstract

Thermophysical properties of liquid multicomponent alloys J. Brillo, I. Egry Deutsches Zentrum f. Luft- und Raumfahrt, Institute of Space Simulation, D-51170 Koeln, Germany 1. Purpose The study of thermophysical properties of liquid metals is not only important for the simulation of certain industrial manufacturing processes, it also reveils insight into interesting physical processes, such as liquid-liquid phase transitions. Due to the increased reactivity of liquid metals at higher temperatures, pollution of the sample material from the reaction with the container walls is often a problem. Therefore, containerless methods are preferred. 2. Experimental techniques Selected methods for hight temperature measurements of both, caloric quantities, like specific heat, cP, and thermal diffusivity , and thermophysical properties, like density , surface tension , electric conductivity , and viscosity , are listed in the following table1. These techniques include container-based as well as containerless methods. In the containerless techniques image processing plays a key role. For instance, surface tension is obtained from the frequency spectrum of the sample’s oscillations, viscosity from their time decay. 3. Results As a specific example of recent results surface tension and viscosity data are presented for the ternary system Ni-Cu-Fe. The surface tensions are shown in Fig.1 for 1800 K. The data are in good agreement with numerical solutions of the Butler equation. Fig. 2 shows viscosity data for the same system, which have been measured by the oscillating cup method. It turns out that, for this system, surface tension and viscosity are proportional to each other – as predicted by Egry2 and Kaptay3.

Document Type:Conference or Workshop Item (Speech)
Title:Thermophysical properties of liquid multicomponent alloys
Authors:
AuthorsInstitution or Email of Authors
Brillo, JürgenUNSPECIFIED
Egry, IvanUNSPECIFIED
Date:18 September 2006
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Thermophysical properties, Liquid alloys, Containerbased techniques, Containerless techniques
Event Title:152nd ISIJ Meeting
Event Location:Niigata, Japan
Event Type:international Conference
Event Dates:September, 16-18, 2006
Organizer:Institute for Steel and Iron Japan
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Institute of Space Simulation > Center for Solidification of Undercooled Melts (ZEUS)
Deposited By: Dr.rer.nat. Jürgen Brillo
Deposited On:17 Oct 2006
Last Modified:14 Jan 2010 23:23

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