Colloids as model systems for metals and alloys: a case study of crystallization
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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 crystallization 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 interaction potential can be systematically tuned by a variation of the particle number density and the salt concentration. 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.
KeywordsInterfacial Energy European Physical Journal Special Topic Nucleation Rate Colloidal Suspension Colloidal System
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- 1.D.M. Herlach, P. Galenko, D. Holland-Moritz, Metastable Solids from Undercooled Melts, edited by R. Cahn (Pergamon Materials Series, 2007)Google Scholar
- 2.K.F. Kelton, A.L. Greer, Nucleation (Pergamon Materials Series, 2009)Google Scholar
- 3.A. Sood, Solid State Phys. 45, 1 (1995)Google Scholar
- 6.P. Wette, Ph.D. thesis, University Mainz, 2006Google Scholar
- 9.I. Klassen, Ph.D. thesis, Ruhr-University Bochum, 2009Google Scholar
- 18.A. Stipp, Ph.D. thesis, Johannes Gutenberg University Mainz, 2005Google Scholar
- 21.V. Simonet, Ph.D. Thesis, Université de Paris-Sud U.F.R. Scientifique d'Orsay, France, 1998Google Scholar
- 26.D.R. Nelson, F. Spaepen, Solid State Phys. 42, 1 (1989)Google Scholar
- 34.J.W. Christian, The Theory of Transformations in Metals and Alloys, Chapter 10 (Pergamon, Oxford, 1975)Google Scholar
- 46.C.V. Thompson, Ph.D. Thesis, Harvard University, 1979Google Scholar
- 47.D. Holland-Moritz, Int. J. Non-Equilibrium Proc. 11, 169 (1998)Google Scholar