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Catalytic efficiency of oxide particles on heterogeneous nucleation in aluminium alloys with miscibility gap

Kaban, Ivan and Köhler, Markus and Hoyer, Walter and Ratke, Lorenz (2010) Catalytic efficiency of oxide particles on heterogeneous nucleation in aluminium alloys with miscibility gap. High Temperatures - High Pressures, 39 (4), pp. 347-355. Old City Publishing. ISSN 1472-3441.

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Official URL: http://www.oldcitypublishing.com/HTHP/HTHP.html

Abstract

It is shown that ZrO2 nanoparticles essentially stimulate the heterogeneous nucleation of droplets from the minority phase in Al-Pb monotectic alloys, which results in a significant increase of the number of Pb particles and in a decrease of their size upon solidification. This is related to the contact angle between coexisting liquid phases and ZrO2 ceramic, which is 20–30 degrees in the Al35Pb65 alloy and 35–40 degrees in the Al29.4In70.6 alloy. In the Al34.5Bi65.5 alloy at 670ºC, the contact angle at the (l-l) interface and ZrO2 ceramics shows a hysteresis between 37º and 115º. The contact angle between coexisting liquid phases and Al2O3 ceramic is close to zero in the Al34.5Bi65.5 alloy.

Document Type:Article
Title:Catalytic efficiency of oxide particles on heterogeneous nucleation in aluminium alloys with miscibility gap
Authors:
AuthorsInstitution or Email of Authors
Kaban, IvanLeibniz-Institut für Festkörper- und Werkstoffforschung
Köhler, Markusmarkus.koehler@dlr.de
Hoyer, WalterTU Chemnitz
Ratke, Lorenzlorenz.ratke@dlr.de
Date:December 2010
Journal or Publication Title:High Temperatures - High Pressures
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Volume:39
Page Range:pp. 347-355
Publisher:Old City Publishing
ISSN:1472-3441
Status:Published
Keywords:aluminium alloys; miscibility gap; wetting; heterogeneous nucleation; inoculants.
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 Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Prof. Lorenz Ratke
Deposited On:16 Feb 2011 16:26
Last Modified:16 Feb 2011 16:26

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