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Colloids as model systems for metals and alloys: a case study of crystallization

Herlach, Dieter and Klassen, Ina and Wette, Patrick and Holland-Moritz, Dirk (2010) Colloids as model systems for metals and alloys: a case study of crystallization. Journal of Physics - Condensed Matter, 22 (15), 153101-1-153101-20. IOP Publishing. DOI: 10.1088/0953-8984/22/15/153101.

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Abstract

Metallic systems are widely used as materials in daily human life. Their properties depend very much on the production route. In order to improve the production process and even develop novel materials a detailed knowledge of all physical processes involved in crystallization is mandatory. Atomic systems like metals are characterized by very high relaxation rates, which make direct investigations of crys-tallization very difficult and in some cases impossible. In contrast, phase transitions in colloidal systems are very sluggish and colloidal suspensions are optically transparent. Therefore, colloidal systems are often discussed as model systems for metals. In the present work, we study the crystallization process of charged colloidal systems from the very beginning. Charged colloids offer the advantage that the interac-tion potential can be systematically tuned by a variation of the particle number density and the salt con-centration. We apply light scattering and ultra-small angle x-ray scattering to investigate the formation of short-range order in the liquid state even far from equilibrium, crystal nucleation and crystal growth. The results are compared with equivalent studies on metallic systems. They are critically assessed with respect to similarities and differences

Document Type:Article
Title:Colloids as model systems for metals and alloys: a case study of crystallization
Authors:
AuthorsInstitution or Email of Authors
Herlach, Dieterdieter.herlach@dlr.de
Klassen, Inaina.klassen@dlr.de
Wette, Patrickpatrick.wette@dlr.de
Holland-Moritz, Dirkdirk.holland-morirt@dlr.de
Date:March 2010
Journal or Publication Title:Journal of Physics - Condensed Matter
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:22
DOI:10.1088/0953-8984/22/15/153101
Page Range:153101-1-153101-20
Publisher:IOP Publishing
Status:Published
Keywords:charged colloidal suspensions, short range order in liquid state, nucleation
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: Dieter Herlach
Deposited On:11 Mar 2010 11:42
Last Modified:12 Dec 2013 20:55

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